1996-00. 4.3, 5.0, 5.7, 7.4L, 4.3, 5.0, 5.7, 7.4L. Astro, Safari. 4.3l. All models. 5.7l. Without zr1. 6 cylinder. 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

All models. 4.3l. Express, savana. 4.3l. 2nd Design. Stamped #12590195. Sends signals to the engine control module (ECM) to adjust timing Helps prevent damage to the engine caused by pre-ignition

This part requires programming and/or special setup procedures GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
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