Brake Warning System Schematics

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, 2004 Chevrolet Cab & Chassis Silverado, and 2003 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Power, Ground, Serial Data and Indicator Control Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 2: Switches Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 3: Supplemental Brake Assist Schematic

Courtesy of GENERAL MOTORS CORP.