GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Front Blower Controls


Object Number: 600857  Size: FS
HVAC Components
HVAC Blower Controls Circuit Description
Rear Blower Controls
HVAC Compressor and Auxiliary Coollant Bypass Pump Controls
Handling ESD Sensitive Parts Notice
HVAC/DIC/DRL/Heated Seat, HVAC Blower and RR HVAC/TEMP CONT Fuses
Cell 14: G200
Figure 2:

Rear Blower Controls


Object Number: 600859  Size: FS
HVAC Components
HVAC Blower Controls Circuit Description
Front Blower Controls
Rear Air Delivery
Rear Air Delivery
Rear Air Delivery
Interior Lights Dimming Schematics (Cell 117: Rear Window Wiper/Washer and Multifunction Switch, Window Switches, Door Lock Switches)
HVAC/DIC/DRL/Heated Seat, HVAC Blower and RR HVAC/TEMP CONT Fuses
Cell 14: G401
Cell 14: G301
Cell 14: G200