3.0L diesel. 2.7L turbo. With auxiliary battery, without dual alternator, primary battery, 6.6L gas.

Junction Block Cover

With auxiliary battery, with dual alternator, primary battery. 5.3, 6.2L, with fuel management. 2.7L turbo. Without auxiliary battery. 4.3L. 3.0L diesel. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Module

Instrument panel, driver side, body control. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. 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 Manufactured to GM OE specification for fit, form, and function

Mount Bracket

Instrument panel, driver side, gateway module. Onstar. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors