WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Schematics Diagram - Blower Controls
Courtesy of GENERAL MOTORS CORP.
Fig 2: Schematics Diagram - Compressor Controls
Courtesy of GENERAL MOTORS CORP.
Fig 3: Schematics Diagram - Air Delivery/Temperature Controls
Courtesy of GENERAL MOTORS CORP.
Fig 4: HVAC Vacuum Schematics Diagram - Air Delivery (CJ3)