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

HVAC Control Module


Object Number: 760009  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Blower Control
IGN 3 RR, ABS, HVAC Fuses (Fuse Block-Rear)
Battery Feed to the Fuse Block-Rear
Serial Data Class 2
G201, 1 of 3
G201, 1 of 3
Theft Deterrent Control Module
G201, 1 of 3
Instrument Panel/Console Dimming
Figure 2:

Blower Control


Object Number: 631105  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
G201, 1 of 3
Compressor Control
HVAC Control Module
Battery Feed to the Fuse Block-Rear
Figure 3:

Compressor Control


Object Number: 792479  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
A/C Orifice Solenoid
Blower Control
Internal Mode Switch Inputs
G100 and G102, L47
Car Battery Feed to the Fuse Block-Underhood
IGN SW (Fuse Block-Rear)
Figure 4:

A/C Orifice Solenoid


Object Number: 410580  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Air Delivery
Car Battery Feed to the Fuse Block-Underhood
Compressor Control
G103
G103
G103
Figure 5:

Air Delivery


Object Number: 631107  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Air Temperature Sensors
Battery Feed to the Fuse Block-Rear
IGN 3 RR, ABS, HVAC Fuses (Fuse Block-Rear)
A/C Orifice Solenoid
Figure 6:

Air Temperature Sensors


Object Number: 631106  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Steering Wheel Controls
Air Delivery
Headlamp Switch and Sunload Sensor Assembly
Dimming Control
Figure 7:

Steering Wheel Controls


Object Number: 764692  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Air Temperature Sensors