Description: 6.0L. Iridium. Vendor:acdelco. Vendor #41-985. Iridium is the latest in spark plug technology and is an exact replacement for vehicles' original components\ Iridium composition provides a high melting point and great strength, helps to provide excellent we ...

Description: 6.2L with supercharger. 5.3L. 5.7L.

Description: Sends signals to the engine control module (ECM) to adjust timing
Helps prevent damage to the engine caused by pre-ignition

Description: Helps keep engine timing and fuel injection running in sync
Helps provide proper alignment, positioning, and spacing for easy installation
Synchronizes engine valves and pistons for excellent engine performance

Description: High quality coated windings to improve durability and provide protection against internal shorts and dielectric breakdown
Silicone steel plates surrounding the ignition coil correctly match the original part size and number exactly
Laminations are coated to hinder corrosion and many feature molded plastic protection to help ensure that nothing is exposed

Description: 2003-05, 5.3L. 6.2L without supercharger. 6.0 & 6.2L. 7.0L. 2008-09. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors