HVAC Schematics

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Module Power, Ground, Serial Data, Front Blower Controls and Hybrid Cabin Heating

GM1906949

Courtesy of GENERAL MOTORS CORP.

Fig 2: Front Mode Controls

GM1906953

Courtesy of GENERAL MOTORS CORP.

Fig 3: Front Temperature Controls

GM1906957

Courtesy of GENERAL MOTORS CORP.

Fig 4: Front Temperature Sensors

GM1906961

Courtesy of GENERAL MOTORS CORP.

Fig 5: Auxiliary Blower Controls

GM1906964

Courtesy of GENERAL MOTORS CORP.

Fig 6: Auxiliary Mode and Temperature Controls

GM1906967

Courtesy of GENERAL MOTORS CORP.

Fig 7: Auxiliary Temperature Sensors

GM1906970

Courtesy of GENERAL MOTORS CORP.

Fig 8: A/C Compressor Controls

GM1907171

Courtesy of GENERAL MOTORS CORP.

Fig 9: A/C Compressor Controls (HP2)

GM1992587

Courtesy of GENERAL MOTORS CORP.