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

EBCM, ABS Relay and DIC


Object Number: 1492828  Size: FS
Master Electrical Component List
Air ABS Description and Operation
Stoplamp Switch
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
B+ Bus Bar
I/P Fuse Block, R-RR TRUCK, L-RR TRUCK, GAGES, and SIR Fuses/Circuit Breaker
BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers
BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers
Driver Information Center (DIC)
G101 - 2 of 2
G100 (L18)
J1939 Serial Data (LG5/L18/LG4/LC8)
Data Link Connector, Power, and Ground - 1 of 2
G200, G202, and G203 - 1 of 4
Figure 2:

Stop Lamp Switch


Object Number: 1492829  Size: FS
Master Electrical Component List
Air ABS Description and Operation
Wheel Speed Sensor and Brake Pressure Modulator Valves
EBC, Air Brake Relay, Telltale Module ABS
Ignition Switch, RUN and ACC/RUN Bus Bars
BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers
Figure 3:

BPMV and WSS


Object Number: 1492831  Size: FS
Master Electrical Component List
Air ABS Description and Operation
Brake Pressure Modulator Valves
Stoplamp Switch
Figure 4:

BPMV


Object Number: 1492832  Size: FS
Master Electrical Component List
Air ABS Description and Operation
Wheel Speed Sensor and Brake Pressure Modulator Valves
Engine Exhaust System