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

Power, Ground, Serial Data, and Front Blower Controls


Object Number: 879563  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Sun Load and Ambient Light Sensors
BRAKE, HTR A/C, HVAC I
Recirculation and Mode Door Controls
HVAC B, RR HVAC, BLOWER, RR DEFOG, STOP LP, TREC
HVAC B, RR HVAC, BLOWER, RR DEFOG, STOP LP, TREC
G203-1 of 3
G203-1 of 3
SP205 - 1 of 2
G200-1 of 3
Figure 2:

Sun Load and Ambient Light Sensors


Object Number: 879564  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Front Left and Right Temperature Control
Power, Ground, Serial Data, and Front Blower Controls
SP205 - 1 of 2
Figure 3:

Front Left and Right Temperature Control


Object Number: 879565  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Recirculation and Mode Door Controls
Sun Load and Ambient Light Sensors
Recirculation and Mode Door Controls
Recirculation and Mode Door Controls
Recirculation and Mode Door Controls
Recirculation and Mode Door Controls
Figure 4:

Recirculation and Mode Door Controls


Object Number: 879566  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Front Air Temperature Sensors
Front Left and Right Temperature Control
Power, Ground, Serial Data, and Front Blower Controls
Front Left and Right Temperature Control
Front Left and Right Temperature Control
Front Left and Right Temperature Control
Front Left and Right Temperature Control
Figure 5:

Front Air Temperature Sensors


Object Number: 879567  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
A/C Compressor Controls
Recirculation and Mode Door Controls
G200-3 of 3
G200-3 of 3
G200-1 of 3
G200-1 of 3
G200-1 of 3
Figure 6:

A/C Compressor Controls


Object Number: 879572  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Front Air Temperature Sensors
B+ Bus Bar - 3 of 3
IGN E
SP205 - 1 of 2
G104, G106, G107