HVAC Schematics

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Module Power, Ground, Serial Data & Blower Controls Circuit Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 2: Mode Controls Circuit Schematic

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Fig 3: Temperature Controls Circuit Schematic

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Fig 4: Temperature Sensors Circuit Schematic

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Fig 5: A/C Compressor Controls Circuit Schematic (Except HP2)

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Fig 6: A/C Compressor Controls Circuit Schematic (HP2)

Courtesy of GENERAL MOTORS CORP.