NGK 1465 Spark Plug

NGK Laser Iridium Spark Plug 1465

NGK Laser Iridium Spark Plug 1465 is an OE-style ignition replacement built for consistent combustion, stable idle quality, and long service intervals. It is a direct choice for many Chevrolet, GMC, Cadillac, and related GM applications that call for a 0.040 in. gap and tapered-seat spark plug design.

The Laser Iridium line combines an iridium center electrode tip with a nickel ground electrode to support precise spark delivery and dependable performance in daily driving, towing, and highway use. Part number 1465 is also referenced as IZTR5B11.

Key Features

• Laser Iridium center electrode tip for durable spark performance
• Nickel ground electrode with standard configuration and standard tip design
• 0.044 pre-gap size listed; many confirmed applications call for a 0.040 in. gap
• 5000 ohm resistance for ignition system compatibility
• Tapered seat, 14 mm thread diameter, 5/8 in. hex size
• Copper core center electrode for heat transfer support
• OE-equivalent design for many GM truck, SUV, and performance applications

Detailed Description

NGK 1465 is a Laser Iridium spark plug engineered to match OE service expectations across a wide range of GM vehicles. Confirmed applications include Chevrolet Silverado 1500, Silverado 2500 HD, Tahoe, Corvette, Express 2500, GMC Sierra 1500, Yukon, and Cadillac Escalade models, along with other listed Chevrolet and GMC platforms. For shoppers searching for a spark plug for 2012-2017 Chevrolet Silverado 2500 HD, a spark plug for 2008-2014 GMC Yukon, or an NGK iridium plug for Chevrolet Corvette applications, this part number is a direct fitment match in the listed vehicles.

NGK’s OE supplier background matters here: the brand manufactures ignition components for domestic and import vehicles and focuses on original-equipment standards for durability and operational consistency. Part number 1465 is built for vehicles that specify a tapered-seat plug with a 0.040 in. gap in many applications, making it a practical replacement for maintenance intervals on high-mileage GM trucks, vans, SUVs, and performance cars.

This part cross-references DENSO Auto Parts 4511 for the same application.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition performance
• Misfire codes related to plug wear or incorrect gap
• Reduced throttle response from inconsistent spark delivery
• Maintenance replacement for OE service intervals on listed GM vehicles

Installation Notes and Tips

• Verify the vehicle-specific gap before installation; many listed applications call for 0.040 in.
• Use the correct tapered-seat torque procedure for the cylinder head material.
• Inspect ignition coils, boots, and wires during service to avoid repeat misfire concerns.
• Confirm the engine application against the fitment list before ordering, especially on Silverado, Sierra, Tahoe, Yukon, and Express models.

Quality Assurance

NGK is a long-established OE supplier with more than 80 years of automotive ignition experience. The brand’s manufacturing and distribution network supports consistent product standards for spark plugs used in passenger vehicles, trucks, motorcycles, marine engines, and small engines.