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

Power, Ground, and Blower Controls


Object Number: 2086594  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Air Temperature and Ambient Light Sensors
BATT MAIN 1, CAN VENT, CLSTR, HVAC BLOWER, INFO, INT LTS, ONSTAR, REAR DEFOG, and RVC Fuses
RUN/CRANK BUS - MAF, PCM, IGN, SIR DISPLAY and TRANS Fuses
AMP, BCM, CHMSL/DIMR, HVAC/RFA, and RDO Fuses
Low Speed GMLAN
Defogger Schematics
Interior Lights Dimming Schematics
G203 and G205
G201
Figure 2:

Air Temperature and Ambient Light Sensors


Object Number: 2086598  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Mode, Recirculation, and Temperature Actuators
Power, Ground, Blower Controls
G201
Figure 3:

Mode, Recirculation, and Temperature Actuators


Object Number: 2086601  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Rear HVAC Controls and Actuators
Air Temperature and Ambient Light Sensors
Figure 4:

Rear HVAC Controls and Actuators


Object Number: 2086603  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
A/C Compressor Controls
Mode, Recirculation, and Temperature Actuators
ABS, ABS MTR, AUX PWR, AWD, ECMBAT, PWR OUTLET, REAR APO, REAR HVAC, and TCM BAT Fuses
G401
Figure 5:

A/C Compressor Controls


Object Number: 2086605  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Rear HVAC Controls and Actuators
PWR/TRN BUS - EMM DEV 1 and EMM DEV 2
B+ BUS 1 of 2
G103, G105, G107, G108, and G109