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

Power, Ground and Blower Motor Controls


Object Number: 1501030  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Compressor Controls
Underhood Junction Block - IBCM Batt1, BCM - Radio/RFA, Ignigion Sensor, HVAC BATT, Cluster/Theft, Air Bag Batt Fuses
Underhood Junction Block - IBCM Batt1, BCM - Radio/RFA, Ignigion Sensor, HVAC BATT, Cluster/Theft, Air Bag Batt Fuses
Underhood Junction Block - IBCM Batt1, BCM - Radio/RFA, Ignigion Sensor, HVAC BATT, Cluster/Theft, Air Bag Batt Fuses
Underhood Fuse Block - Run Relay, RBEC Battery 2 Fuses, Rear Fuse BLock - Driver Power Seat, Fuel Pump, Park Lamps, Trunk Release, ERLS Fuses
G201
G203
Figure 2:

Compressor Controls


Object Number: 1501032  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Mode and Air Temperature Controls
Power, Ground, and Blower Motor Controls
Low Speed Serial Data
Power, Ground, Class 2 and High Speed Serial Data
Air, A/C Clutch, ECT IGN, ERLS #1 Fuses
B+ Bussing
G106
Figure 3:

Mode and Air Temperature Controls


Object Number: 1581295  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Compressor Controls