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

Power, Ground and Blower Motor Controls


Object Number: 1532275  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Compressor Controls
Ignition Switch, BCM2 Fuse, IGN SW Fuse, STOP LPS Fuse, AUDIO AMPLIFIER Fuse, CLUSTER Fuse, HVAC/PK3 Fuse
RUN/CRANK Relay, HVAC Relay, I/P IGN Fuse, BCM3 Fuse, WIPER Fuse, RESTRAINTS Fuse, EPS Fuse
Clutch Pedal Position Switch and Stop Lamp Switch
G109, G203, and G306
Figure 2:

Compressor Controls


Object Number: 1532285  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Mode and Air Temperature Controls
Power, Ground and Blower Motor Controls
AFTERCOOL Relay, AFTERCOOL Fuse, A/C CLUTCH Relay, A/C Fuse, HORN PCB Relay, HORN Fuse, FOG LAMP PCB Relay, FOG LAMP Fuse, TRUNK/OUTLET Relay, TRUNK RELEASE PCB Relay
DLC High Speed, Serial Data, Class 2
Figure 3:

Mode and Air Temperature Controls


Object Number: 1532288  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Compressor Controls