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

Blower Controls


Object Number: 1903885  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
A/C Compressor Controls
Fuse Block I/P 1: Circuit Breaker 6
Fuse Block I/P 1: Circuit Breaker 6
Fuse Block I/P 1: Circuit Breaker 6
G400 - 5 of 8
Fuse Block 1: Fuses 6 and 7, Fuse Block 2: Fuse 8, and Fuse Block I/P 2: Circuit Breakers 17, 18, 20, 21, 22, and 24
A/C Condensor Fan Controls
A/C Compressor Controls
A/C Compressor Controls
Air Delivery and Temperature Controls - 1 of 2
G400 - 6 of 8
Figure 2:

A/C Compressor Controls


Object Number: 1903886  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
A/C Condensor Fan Controls
Blower Controls
Blower Controls
Blower Controls
A/C Condensor Fan Controls
Wipers/Washer System Schematics
G400 - 2 of 8
Fuse Block 1: Fuses 6 and 7, Fuse Block 2: Fuse 8, and Fuse Block I/P 2: Circuit Breakers 17, 18, 20, 21, 22, and 24
Fuse Block 1: Fuses 6 and 7, Fuse Block 2: Fuse 8, and Fuse Block I/P 2: Circuit Breakers 17, 18, 20, 21, 22, and 24
Figure 3:

A/C Condensor Fan Controls


Object Number: 1903887  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Air Delivery and Temperature Controls - 1 of 2
A/C Compressor Controls
Blower Controls
A/C Compressor Controls
G400 - 2 of 8
Fuse Block 1: Fuses 6 and 7, Fuse Block 2: Fuse 8, and Fuse Block I/P 2: Circuit Breakers 17, 18, 20, 21, 22, and 24
Fuse Block 1: Fuses 6 and 7, Fuse Block 2: Fuse 8, and Fuse Block I/P 2: Circuit Breakers 17, 18, 20, 21, 22, and 24
Figure 4:

Air Delivery and Temperature Controls - 1 of 2


Object Number: 1903888  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Air Delivery and Temperature Controls - 2 of 2
A/C Condensor Fan Controls
Blower Controls
Figure 5:

Air Delivery and Temperature Controls - 2 of 2


Object Number: 1903891  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Air Delivery and Temperature Controls - 1 of 2
G400 - 6 of 8