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

Blower Controls


Object Number: 1872711  Size: FS
Master Electrical Component List
Automatic HVAC Description and Operation
Control Module References
A/C Compressor Controls
Figure 2:

A/C Compressor Controls


Object Number: 1872715  Size: FS
Master Electrical Component List
Automatic HVAC Description and Operation
Control Module References
Air Delivery and Temp Controls
Blower Controls
Figure 3:

Air Delivery and Temperature Controls


Object Number: 1872717  Size: FS
Master Electrical Component List
Automatic HVAC Description and Operation
Control Module References
Air Sensors
A/C Compressor Controls
Figure 4:

Air Sensors


Object Number: 1872720  Size: FS
Master Electrical Component List
Automatic HVAC Description and Operation
Control Module References
Auxiliary Blower Motor (C57)
Air Delivery and Temp Controls
Figure 5:

Auxiliary Blower Motor (C57)


Object Number: 1872725  Size: FS
Master Electrical Component List
Automatic HVAC Description and Operation
Control Module References
Air Sensors