Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Description: 6.6L. 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 This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Description: Silverado, sierra. 6.6l. Express, savana. Diesel engines. 6.6l diesel. All models. With diesel engine. Option 2. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type