WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Blower Controls Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 2: Compressor Controls Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 3: Air Delivery/Temperature Controls Schematics - Power, Ground And DLC
Courtesy of GENERAL MOTORS CORP.
Fig 4: Air Delivery/Temperature Controls Schematics - Actuator Control
Courtesy of GENERAL MOTORS CORP.
Fig 5: Air Delivery/Temperature Controls Schematics - Solenoid Control