Wiring Diagrams

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 GMC C3500 HD, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: SIR System Wiring Diagram (Sierra 1500/2500 & Silverado 1500/2500)

Fig 2: SIR System Wiring Diagram (Sierra 3500 & Silverado 3500)