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

EBCM, Air Brake Relay, Telltale Module ABS


Object Number: 798362  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 - RUN and ACC/RUN Bus Bars
ABS 1, ABS 2, ABS 3, E/A PUMP, and HORN Fuses/Circuit Breakers
GAUGES, L-RR TRUCK, R-RR TRUCK, and SIR Fuses/Circuit Breakers
AXLE/4WD, BRAKE, CHASSIS, and HTR/AC Fuses/Circuit Breakers
AXLE/4WD, BRAKE, CHASSIS, and HTR/AC Fuses/Circuit Breakers
Driver Information Center (DIC)
G101 - 2 of 2
G100 (LG4)
J1939 Serial Data (L65/L18/LG4/LC8) - 2 of 2
Data Link Connector, Power and Ground - 1 of 2
G200, G202, and G203 - 1 of 4
Figure 2:

Brake Switch, Air Dryer Heater Switch


Object Number: 1464336  Size: FS
Master Electrical Component List
Air ABS Description and Operation
Wheel Speed Sensors and Brake Pressure Modulator Valves
EBC, Air Brake Relay, Telltale Module ABS
Ignition Switch - RUN and ACC/RUN Bus Bars
AXLE/4WD, BRAKE, CHASSIS, and HTR/AC Fuses/Circuit Breakers
Figure 3:

Wheel Speed Sensors, EBCM, TCS Module


Object Number: 798348  Size: FS
Master Electrical Component List
Air ABS Description and Operation
Brake Pressure Modulator Valves
Stoplamp Switch
Figure 4:

TCS Valve, EBC, TCS Modulator


Object Number: 798359  Size: FS
Master Electrical Component List
Air ABS Description and Operation
Wheel Speed Sensors and Brake Pressure Modulator Valves
Engine Exhaust System