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

Brake Warning Indicators


Object Number: 1842363  Size: FS
Master Electrical Component List
Air Brake System Description and Operation
Control Module References
Air Brake Dryer
Fuse Block 2: Fuses 9, 11, 12, 13, and 14, Fuse Block I/P 1: Circuit Breaker 11, and Fuse Block I/P 2: Circuit Breakers 25 and 26
Fuse Block 2: Fuses 9, 11, 12, 13, and 14, Fuse Block I/P 1: Circuit Breaker 11, and Fuse Block I/P 2: Circuit Breakers 25 and 26
Fuse Block 1: Fuse 5 and Fuse Block I/P 1: Circuit Breakers 5, 9 - 1 of 2, and 10
Fuse Block 1: Fuse 5 and Fuse Block I/P 1: Circuit Breakers 5, 9 - 1 of 2, and 10
Fuse Block I/P 1: Circuit Breaker 6
Fuse Block I/P 1: Circuit Breaker 6
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
Controlled/Monitored Subsystem References
Stop Lamps
G400 and G402 - 4 of 8
Controlled/Monitored Subsystem References
G400 and G402 - 5 of 8
Driver Information Center (DIC)
Headlights/Daytime Running Lights 1 of 2
Power, Ground, and Serial Data
Power, Ground, and Serial Data
Controller Area Network (CAN) Connector and Data Link Connector (DLC)
G400 and G402 - 4 of 8
G400 and G402 - 2 of 8
G100, G101, G102, G107, G114, G208, G209, G210, G214, G400 and G402 - 1 of 8, G501, G502, G601, and G602
Figure 2:

Air Brake Dryer


Object Number: 1842366  Size: FS
Master Electrical Component List
Air Dryer Description and Operation
Control Module References
Brake Warning Indicators
Fuse Block 1: Fuse 5 and Fuse Block I/P 1: Circuit Breakers 5, 9 - 1 of 2, and 10
Fuse Block I/P 1: Circuit Breaker 9 - 2 of 2
G400 and G402 - 2 of 8