HVAC 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

Courtesy of GENERAL MOTORS CORP.

Fig 2: Compressor Controls

Courtesy of GENERAL MOTORS CORP.

Fig 3: Air Delivery/Temperature Actuators

Courtesy of GENERAL MOTORS CORP.

Fig 4: Rear Mode Controls - Short Wheel Base

Courtesy of GENERAL MOTORS CORP.

Fig 5: Rear Mode Controls - Long Wheel Base

Courtesy of GENERAL MOTORS CORP.