HVAC Wiring Schematics

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Module Power, Ground, Serial Data, Blower Motor, and Coolant Bypass Valve Wiring Schematic

GM1256292

Courtesy of GENERAL MOTORS CORP.

Fig 2: Compressor Controls Wiring Schematic

GM1256294

Courtesy of GENERAL MOTORS CORP.

Fig 3: Air Delivery/Temperature Actuators Wiring Schematic

GM1256295

Courtesy of GENERAL MOTORS CORP.

Fig 4: Air Temperature Sensors Wiring Schematic

GM1256298

Courtesy of GENERAL MOTORS CORP.

Fig 5: Ambient Light/Sunload Sensor Wiring Schematic

GM1256301

Courtesy of GENERAL MOTORS CORP.

Fig 6: Rear Auxiliary Controls Schematic - Short Wheel Base and XUV Wiring Schematic

GM1256303

Courtesy of GENERAL MOTORS CORP.

Fig 7: Rear HVAC w/RSA Wiring Schematic - Long Wheel Base except XUV

GM1256309

Courtesy of GENERAL MOTORS CORP.