Description: 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 Dictates the operation of your vehicle's vital systems, which is critical to the performance of your vehicle This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

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 wea ...

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 Manufactured to GM OE specification for fit, form, and function