GM Service Manual Online
For 1990-2009 cars only

HVAC Schematics Manual

Figure 1:

Blower Control


Object Number: 885599  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
G200
G200
G201 (1 of 2)
G201 (1 of 2)
Battery Voltage to the Rear Fuse Block
Compressor Controls
Figure 2:

Compressor Controls


Object Number: 885602  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Start, Horn, A/C CLU Fuses and Relays (Fuse Block Underhood)
G100 and G102
Start, Horn, A/C CLU Fuses and Relays (Fuse Block Underhood)
Engine Data Sensors 5 Volt and Low Reference
Engine Data Sensors 5 Volt and Low Reference
Serial Data Class 2
Air Delivery
Blower Control
Figure 3:

Air Delivery


Object Number: 885604  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Battery Voltage to the Rear Fuse Block
Compressor Controls