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

Power, Ground, Blower Motor Controls, and Subsystem References


Object Number: 1558387  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Compressor Controls
Body Control Module - RUN / CRANK and HVAC Relays, I/P IGN, BCM3, WPR, AIR BAG, EPS / STR WHL CNTRL and HVAC / IP IGNITION Fuses
Body Control Module - BCM 2, HVAC / PK3, CLUSTER, IGN SW, STOP LPS, and AMP Fuses
Body Control Module - RUN / CRANK and HVAC Relays, I/P IGN, BCM3, WPR, AIR BAG, EPS / STR WHL CNTRL and HVAC / IP IGNITION Fuses
Rear Defogger Schematics
Dimmer Switch, Radio, Hazard, Fog Lamps, Steering Wheel Controls, and Rear Wiper/Washer Switches
Body Control Module - BCM 2, HVAC / PK3, CLUSTER, IGN SW, STOP LPS, and AMP Fuses
Body Control Module - RUN / CRANK and HVAC Relays, I/P IGN, BCM3, WPR, AIR BAG, EPS / STR WHL CNTRL and HVAC / IP IGNITION Fuses
Heated Seat - Driver
Passenger Seat Schematics
G201 and G203
Figure 2:

Compressor Controls


Object Number: 1558388  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Mode and Air Temperature Controls
Power, Ground, Blower Motor Controls, and Subsystem References
High Speed GMLAN
Underhood Fuse Block - B+ Bus
G109
Figure 3:

Mode and Air Temperature Controls


Object Number: 1558389  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Compressor Controls