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

Power, Ground, Serial Data, and Ambient Light Sensor


Object Number: 879553  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Front Blower Controls
BRAKE, HTR A/C, HVAC I
HVAC B, RR HVAC, BLOWER, RR DEFOG, STOP LP, TREC
Mode and Recirculation Door Controls
SP205 - 1 of 2
G203-1 of 3
G203-1 of 3
Figure 2:

Front Blower Controls


Object Number: 879554  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Front Left and Right Temperature Control
Power, Ground, Serial Data, and Ambient Light Sensor
BRAKE, HTR A/C, HVAC I
HVAC B, RR HVAC, BLOWER, RR DEFOG, STOP LP, TREC
G200-1 of 3
Figure 3:

Front Left and Right Temperature Control


Object Number: 879555  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Mode and Recirculation Door Controls
Front Blower Controls
Mode and Recirculation Door Controls
Mode and Recirculation Door Controls
Mode and Recirculation Door Controls
Mode and Recirculation Door Controls
Figure 4:

Mode and Recirculation Door Controls


Object Number: 879556  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
A/C Compressor Controls
Front Left and Right Temperature Control
Power, Ground, Serial Data, and Ambient Light Sensor
Front Left and Right Temperature Control
Front Left and Right Temperature Control
Front Left and Right Temperature Control
Front Left and Right Temperature Control
G200-1 of 3
Figure 5:

A/C Compressor Controls


Object Number: 879562  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Mode and Recirculation Door Controls
B+ Bus Bar - 3 of 3
IGN E
SP205 - 1 of 2
G104, G106, G107