HVAC Schematics

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Power, Ground, and Serial Data

Courtesy of GENERAL MOTORS CORP.

Fig 2: Front Blower Controls

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Fig 3: Front Left and Right Temperature Control

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Fig 4: Mode and Recirculation Door Controls

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Fig 5: Auxiliary Heater Pump (HP2)

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Fig 6: A/C Compressor Controls

Courtesy of GENERAL MOTORS CORP.