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

Blower Control


Object Number: 885623  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Rear Fuse Block - B+ Bus
G201 (1 of 2)
HVAC Control
Figure 2:

HVAC Control


Object Number: 885625  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Serial Data Class 2
G200
G200
Rear Fuse Block - B+ Bus
I/P and Console Dimming
G201 (1 of 2)
IGN3 RR, and ABS Fuses (Fuse Block Rear)
G201 (1 of 2)
Compressor Controls - 3.8L
Blower Control
Figure 3:

Compressor Controls - 3.8L


Object Number: 1220128  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Underhood Fuse Block B+ Bus - 3.8L
G104 and G105 - 3.8L
Start Circuit Breaker, Horn, and A/C CLU Fuses 3.8L
Fuel Sensor and EVAP Solenoid Controls
Fuel Sensor and EVAP Solenoid Controls
Serial Data Class 2
Compressor Controls - 4.6L
HVAC Control
Figure 4:

Compressor Controls - 4.6L


Object Number: 1258298  Size: FS
Underhood Fuse Block B+ Bus - 4.6L
Underhood Fuse Block B+ Bus - 4.6L
G108, G110, and G111 - 4.6L
Serial Data Class 2
Master Electrical Component List
Air Temperature Description and Operation
Air Delivery
Compressor Controls - 3.8L
Figure 5:

Air Delivery


Object Number: 885629  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Rear Fuse Block - B+ Bus
Temp Sensors
Compressor Controls - 4.6L
HVAC Fuse
Figure 6:

Temp Sensors


Object Number: 718084  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Headlamp, Foglamp, and Ambient Light Sensor Inputs
Dimming Control
Air Delivery