NGK 94956 Spark Plug

NGK Laser Iridium Spark Plug 94956 Overview

NGK Laser Iridium Spark Plug 94956 is built for OE-style ignition performance and long service life. It uses an iridium-tipped center electrode, a copper core, and a ceramic insulator to help maintain stable spark output and resist overheating in demanding daily driving conditions.

Compatible With select Buick Encore GX, Cadillac CT4, Chevrolet Colorado, Chevrolet Silverado 1500, Chevrolet Trailblazer, GMC Canyon, and GMC Sierra 1500 applications, this NGK Laser Iridium spark plug is engineered for factory-recommended service intervals and precise ignition performance.

Key Features

• Laser Iridium design with an iridium center electrode for durable spark delivery
• Fine-wire center electrode for consistent ignition response
• Copper core construction helps manage heat transfer
• Resistor design with 5,000 ohms resistance
• Tapered seat, M12 x 1.25 thread, 25.0 mm reach, and 14 mm hex
• Pre-gapped to .030 in. / 0.75 mm
• J-gap ground configuration with nickel ground electrode tip
• OE-focused spark plug for modern distributorless ignition systems

Product Details

NGK Laser Iridium spark plugs are built around a fine-wire iridium center electrode and a platinum-iridium metallurgy approach that supports long-term wear resistance. The high-grade ceramic insulator and copper core help control heat, while the resistor design supports stable operation in electronically controlled ignition systems. Part number 94956 is also identified as ILNFR9B7G for cross-reference use.

This part cross-references NGK ILNFR9B7G for the same application.

Common Reasons to Replace

• Hard starting or extended crank time
• Rough idle or inconsistent combustion
• Misfire codes related to worn spark plugs
• Reduced throttle response under load
• Service interval replacement on OE-recommended maintenance schedules

Installation Notes

Verify thread size, reach, seat type, and heat range before installation. Use the specified gap setting if adjustment is required, and install to the vehicle manufacturer’s torque specification. Inspect ignition coils and plug wells for wear, oil intrusion, or carbon tracking before fitting new plugs. Confirm application details for your specific Buick Encore GX, Cadillac CT4, Chevrolet Colorado, Chevrolet Silverado 1500, Chevrolet Trailblazer, GMC Canyon, or GMC Sierra 1500 model year.

Quality Assurance

NGK manufactures this Laser Iridium spark plug to OE application standards and tests it for durability and consistent performance. The design combines iridium, copper, and ceramic materials to support reliable ignition over extended service intervals.