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Champion IridiumChampion 9405 Spark Plug
| Brand | Champion 9405 |
|---|---|
| Center Electrode Tip Material | Iridium |
| Classification | Champion Iridium |
| Electrical Terminal Type | Non-Removable Nut |
| Ground Electrode Core Material | Platinum |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | J Gap |
| Hex Size | 0.625 |
| Hex Size | 15.880 |
| Hex Type | Hex |
| Insulator Height | 0.12 |
| Manufacturer Heat Range | 12 |
| Plug Type | RS12WMPB4 |
| Pre-Gap Size | 0.050 |
| Pre-Gap Size | 1.27 |
| Reach | 0.689 |
| Resistor Type | Yes |
| Seat Type | Tapered |
| Thread Diameter | 0.551 |
| Thread Diameter | 14.000 |
| Product line | Champion Iridium |
| Fits | Chevrolet, GMC, Cadillac, Buick, Hummer, Pontiac, Saturn, Saab, Isuzu, Workhorse, and Oldsmobile · 838 vehicles |
Iridium center electrode. Fine-wire design sharpens spark focus for stronger performance.
Platinum ground electrode. Adds durability to the spark plug’s firing surface.
Tapered seat. Provides a secure, precise sealing surface for installation.
Cross-references Autolite XP5243, Carlson 41100 and Carlson 41110 for the same application. See all 14.
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Champion Iridium Spark Plug 9405
Champion Iridium 9405 is a secondary ignition spark plug built for OE-style service in a wide range of GM trucks, SUVs, and performance cars. It uses a fine-wire iridium center electrode with a platinum ground electrode to sharpen spark focus and support consistent ignition performance.
Key Features
- Fine-wire iridium center electrode for precise spark delivery
- Platinum ground electrode core for durable electrode construction
- Pre-gapped at 0.050 in / 1.27 mm
- Resistor-type plug for ignition system noise control
- Tapered seat design with a 14 mm thread diameter
- Hex size: 15.880 mm / 0.625 in
- Champion Iridium classification, part number 9405
Product Details
Champion Iridium 9405 is engineered around a fine-wire iridium center electrode and a platinum ground electrode to create a focused spark event. That design supports reliable combustion response in applications that call for RS12WMPB4 plug type service. This part cross-references Autolite XP5243 for the same application. It is a direct-fit style spark plug for many Chevrolet Silverado 2500 HD, GMC Sierra 3500 HD, and Chevrolet Camaro applications, along with numerous other GM vehicles listed in the fitment data.
Compatible With 2003-2020 Chevrolet Express 2500, 2003-2020 Chevrolet Express 3500, 2003-2020 GMC Savana 2500, 2003-2020 GMC Savana 3500, 2001-2019 Chevrolet Silverado 2500 HD, 2007-2019 Chevrolet Silverado 3500 HD, 2001-2019 GMC Sierra 2500 HD, and 2007-2019 GMC Sierra 3500 HD. Additional fitment includes Chevrolet Tahoe, GMC Yukon, Cadillac Escalade, Chevrolet Corvette, and Chevrolet Impala applications shown in the vehicle list.
What It Helps Address
- Hard starting caused by worn or inconsistent spark plugs
- Rough idle from weakened ignition output
- Misfire conditions related to electrode wear
- Loss of throttle response from degraded spark focus
- Maintenance replacement for OE-style ignition service
Installation Notes
Verify the plug type, seat style, and gap before installation. This plug is pre-gapped at 0.050 in, while many listed applications call for 0.040 in or other specified gaps in the fitment notes, so always confirm the engine’s required setting before use. Use the correct torque procedure for tapered-seat spark plugs and inspect the ignition coil, boots, and threads during service. Champion Iridium 9405 is listed for a broad range of GM truck, SUV, and performance applications, including Chevrolet Silverado and GMC Sierra platforms.
Quality Assurance
Champion Iridium plugs are built with iridium and platinum electrode materials for durable ignition service and consistent spark focus. Part number 9405 is identified as Champion Iridium RS12WMPB4 service and is supported by the fitment data provided for 1988-2020 model years.
This part fits 838 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2020 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2020 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2020 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2020 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | Chevrolet | Suburban 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2019 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | Chevrolet | Suburban 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2018 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | Caprice | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | Chevrolet | SS | 6.2L | V8 | N/A | Champion Iridium |
| 2017 | Chevrolet | Suburban 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2017 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | Caprice | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | Chevrolet | SS | 6.2L | V8 | N/A | Champion Iridium |
| 2016 | Chevrolet | Suburban 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2016 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Camaro | 7.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Caprice | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | Chevrolet | SS | 6.2L | V8 | N/A | Champion Iridium |
| 2015 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | GMC | Savana 3500 | 4.8L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2015 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Cadillac | Escalade | 6.2L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Camaro | 7.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Camaro | 6.2L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Caprice | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | SS | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Yukon | 5.3L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2014 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Cadillac | Escalade | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Cadillac | Escalade | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Cadillac | Escalade EXT | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Avalanche | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Camaro | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Caprice | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Corvette | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Silverado 1500 | 6.2L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | Chevrolet | Tahoe | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Sierra 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2013 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Cadillac | Escalade | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Cadillac | Escalade | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Cadillac | Escalade EXT | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Avalanche | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Camaro | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Caprice | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Colorado | 5.3L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Corvette | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Silverado 1500 | 6.2L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | Chevrolet | Tahoe | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Canyon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Sierra 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2012 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Buick | Lucerne | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Cadillac | Escalade | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Cadillac | Escalade EXT | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Avalanche | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Camaro | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Caprice | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Colorado | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Corvette | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Impala | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Impala | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Silverado 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | Chevrolet | Tahoe | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Canyon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Sierra 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2011 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Buick | Lucerne | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Cadillac | Escalade | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Cadillac | Escalade EXT | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Avalanche | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Camaro | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Colorado | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Corvette | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Impala | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Impala | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Malibu | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Silverado 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Chevrolet | Tahoe | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Canyon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Sierra 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Hummer | H3 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Hummer | H3T | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Pontiac | G6 | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2010 | Saturn | Vue | 3.5L | V6 | N/A | OE Type; Gap 0.044 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Buick | Allure | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Buick | LaCrosse | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Buick | Lucerne | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Cadillac | Escalade | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Cadillac | Escalade EXT | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Avalanche | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Avalanche | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Colorado | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Corvette | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Impala | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Impala | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Impala | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Malibu | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Silverado 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Suburban 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Tahoe | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Tahoe | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Trailblazer | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Chevrolet | Uplander | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Canyon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Envoy | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Sierra 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Hummer | H2 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Hummer | H3 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Hummer | H3T | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Pontiac | G6 | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Pontiac | G6 | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Pontiac | G8 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Pontiac | G8 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Pontiac | Montana | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Saab | 9-7x | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Saab | 9-7x | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2009 | Saturn | Vue | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Buick | Allure | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Buick | LaCrosse | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Cadillac | Escalade | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Cadillac | Escalade EXT | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Avalanche | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Avalanche | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Corvette | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Impala | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Impala | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Impala | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Malibu | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Suburban 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Tahoe | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Tahoe | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Trailblazer | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Trailblazer | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Chevrolet | Uplander | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Envoy | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Sierra 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Hummer | H2 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Hummer | H3 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Pontiac | G6 | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Pontiac | G6 | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Pontiac | G8 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Pontiac | Grand Prix | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Pontiac | Montana | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Saab | 9-7x | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Saab | 9-7x | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Saturn | Aura | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2008 | Saturn | Vue | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Buick | Rainier | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Buick | Terraza | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Cadillac | CTS | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Cadillac | Escalade | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Cadillac | Escalade ESV | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Cadillac | Escalade EXT | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Avalanche | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Avalanche | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Corvette | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Impala | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Impala | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Impala | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Malibu | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Malibu | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Monte Carlo | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Monte Carlo | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 1500 Classic | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 1500 Classic | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 1500 Classic | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 1500 HD Classic | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 2500 HD Classic | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 3500 Classic | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Silverado 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Suburban 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Trailblazer | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Trailblazer | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Chevrolet | Uplander | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Envoy | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 Classic | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 Classic | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 Classic | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 1500 HD Classic | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 2500 HD Classic | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 3500 Classic | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Sierra 3500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Yukon | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Yukon XL 1500 | 6.2L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Hummer | H2 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Pontiac | G6 | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Pontiac | G6 | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Pontiac | Grand Prix | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Pontiac | Montana | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Saab | 9-7x | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Saturn | Aura | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2007 | Saturn | Relay | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Buick | Rainier | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Buick | Terraza | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Cadillac | CTS | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Cadillac | Escalade ESV | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Cadillac | Escalade EXT | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Corvette | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Impala | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Impala | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Impala | 3.5L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Malibu | 3.9L | V6 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Monte Carlo | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Monte Carlo | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Monte Carlo | 3.5L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | SSR | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Suburban 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Trailblazer | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Trailblazer | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Chevrolet | Uplander | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Envoy | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Envoy XL | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Sierra 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Hummer | H2 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Isuzu | Ascender | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Pontiac | G6 | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Pontiac | Grand Prix | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Pontiac | GTO | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Pontiac | Montana | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Saab | 9-7x | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2006 | Saturn | Relay | 3.9L | V6 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Buick | Rainier | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Cadillac | CTS | 5.7L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Cadillac | Escalade | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Cadillac | Escalade ESV | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Cadillac | Escalade EXT | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Corvette | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Express 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | SSR | 6.0L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Envoy | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Envoy XL | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Envoy XUV | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Savana 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Sierra 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Hummer | H2 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Isuzu | Ascender | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Pontiac | Grand Prix | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Pontiac | GTO | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2005 | Saab | 9-7x | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Buick | Rainier | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Cadillac | CTS | 5.7L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Cadillac | Escalade | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Cadillac | Escalade ESV | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Cadillac | Escalade EXT | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Corvette | 5.7L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Express 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | SSR | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Envoy XL | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Envoy XUV | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Savana 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Savana 3500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Sierra 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Sierra 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Hummer | H2 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Isuzu | Ascender | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2004 | Pontiac | GTO | 5.7L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Cadillac | Escalade | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Cadillac | Escalade ESV | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Cadillac | Escalade EXT | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Express 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Express 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Express 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Silverado 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | SSR | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Envoy XL | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Savana 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Savana 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Savana 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Savana 2500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Savana 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Sierra 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Sierra 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Hummer | H2 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2003 | Isuzu | Ascender | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Cadillac | Escalade | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Cadillac | Escalade | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Cadillac | Escalade EXT | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Camaro | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Cavalier | 2.4L | L4 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Sierra 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Sierra 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2002 | Pontiac | Firebird | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Camaro | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Cavalier | 2.4L | L4 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Sierra 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Sierra 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Sierra 3500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Yukon | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Yukon XL 1500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2001 | Pontiac | Firebird | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Camaro | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Cavalier | 2.4L | L4 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Silverado 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Tahoe | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Chevrolet | Tahoe | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Sierra 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Sierra 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Yukon | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Yukon | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 2000 | Pontiac | Firebird | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | Camaro | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | Cavalier | 2.4L | L4 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | Malibu | 2.4L | L4 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | P30 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | Silverado 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Chevrolet | Silverado 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | P3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | Sierra 1500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | Sierra 1500 | 4.8L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | Sierra 2500 | 6.0L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | GMC | Sierra 2500 | 5.3L | V8 | N/A | OE Type, 0.040 inch gap, Plug Type Number RS12WMPB4; Champion Iridium |
| 1999 | Pontiac | Firebird | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | Camaro | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | Cavalier | 2.4L | L4 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | Malibu | 2.4L | L4 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 1998 | Chevrolet | P30 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | GMC | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | GMC | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | GMC | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | GMC | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | GMC | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | GMC | P3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1998 | Pontiac | Firebird | 5.7L | V8 | N/A | Gap 0.040 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | Chevrolet | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | Chevrolet | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | Chevrolet | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | Chevrolet | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | Chevrolet | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | Chevrolet | P30 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | Chevrolet | S10 | 2.2L | L4 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | GMC | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | GMC | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | GMC | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | GMC | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | GMC | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1997 | GMC | P3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | Corvette | 5.7L | V8 | N/A | Gap 0.050 (in); Plug Type RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | P30 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | Chevrolet | S10 | 2.2L | L4 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | GMC | C2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | GMC | C3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | GMC | K2500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | GMC | K2500 Suburban | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | GMC | K3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1996 | GMC | P3500 | 7.4L | V8 | N/A | Gap 0.060 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1995 | Chevrolet | Monte Carlo | 3.4L | V6 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1995 | Chevrolet | S10 | 2.2L | L4 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1994 | Chevrolet | S10 | 2.2L | L4 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1993 | Oldsmobile | Cutlass Supreme | 3.1L | V6 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1990 | Pontiac | Grand Prix | 3.1L | V6 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1989 | Pontiac | Grand Prix | 3.1L | V6 | N/A | Gap 0.045 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| 1988 | Buick | Skyhawk | 2.0L | L4 | N/A | Gap 0.035 (in); Plug Type Number RS12WMPB4; Champion Iridium |
| No rows match your filter. | ||||||
Directly replaces or cross-references 14 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Autolite — XP5243Carlson — 41100Carlson — 41110CSF — 4509Timken — 6Walker Exhaust — 41962Walker Exhaust — 4198341985125711641259113112621258HGR9LQIOIZTR5B11RS12WMPB4