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/AC, HVAC I, CRUISE, 4WD
HVAC/ECAS, RR HVAC, BLOWER, RR DEFOG, STOP LP, TREC
Mode and Recirculation Door Controls
SP205 - 1 of 2
G203 - 1 Of 2
G203 - 1 Of 2
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, Class 2, and Ambient Light Sensor
BRAKE, HTR/AC, HVAC I, CRUISE, 4WD
HVAC/ECAS, 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
FRP Graphing
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 Control


Object Number: 879556  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Auxiliary HVAC w/Heat and A/C - 1 of 3
Front Left and Right Temperature Control
Power, Ground, Class 2, 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:

Auxiliary HVAC w/ Heat and A/C - 1 of 3


Object Number: 879557  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Auxiliary HVAC w/Heat and A/C - 2 of 3
Mode and Recirculation Door Controls
HVAC/ECAS, RR HVAC, BLOWER, RR DEFOG, STOP LP, TREC
IGN 3
Auxiliary HVAC w/Heat and A/C - 3 of 3
Auxiliary HVAC w/Heat and A/C - 3 of 3
Auxiliary HVAC w/Heat and A/C - 3 of 3
G410 - 1 Of 3
Auxiliary HVAC w/Heat and A/C - 2 of 3
Figure 6:

Auxiliary HVAC w/ Heat and A/C - 2 of 3


Object Number: 879558  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Auxiliary HVAC w/Heat and A/C - 3 of 3
Auxiliary HVAC w/Heat and A/C - 1 of 3
I/P Dimming Supply Voltage - 6 of 7
G410 - 1 Of 3
Auxiliary HVAC w/Heat and A/C - 1 of 3
Figure 7:

Auxiliary HVAC w/ Heat and A/C - 3 of 3


Object Number: 879559  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Auxiliary HVAC w/ A/C - 1 of 2
Auxiliary HVAC w/Heat and A/C - 2 of 3
Auxiliary HVAC w/Heat and A/C - 1 of 3
Auxiliary HVAC w/Heat and A/C - 1 of 3
Auxiliary HVAC w/Heat and A/C - 1 of 3
G410 - 1 Of 3
Figure 8:

Auxiliary HVAC w/ A/C - 1 of 2


Object Number: 879560  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Auxiliary HVAC w/ A/C - 2 of 2
Auxiliary HVAC w/Heat and A/C - 3 of 3
HVAC/ECAS, RR HVAC, BLOWER, RR DEFOG, STOP LP, TREC
IGN 3
G410 - 1 Of 3
Auxiliary HVAC w/ A/C - 2 of 2
Figure 9:

Auxiliary HVAC w/ A/C - 2 of 2


Object Number: 879561  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
A/C Compressor Controls
Auxiliary HVAC w/ A/C - 1 of 2
Auxiliary HVAC w/ A/C - 1 of 2
I/P Dimming Supply Voltage - 6 of 7
G410 - 1 Of 3
Figure 10:

A/C Compressor Controls


Object Number: 879562  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Auxiliary HVAC w/ A/C - 2 of 2
B+ Bus Bar - 2 of 2
IGN E
SP205 - 1 of 2
G104, G107