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

Power, Ground, Brake Pressure Modulator Valve and Wheel Speed Sensors


Object Number: 1637891  Size: FS
Master Electrical Component List
ABS Description and Operation
Control Module References
Brake Pedal Position Sensor, Traction Control Switch and Data Link Communications
Underhood Fuse Block, DRL Relay, LO/BEAM Relay, HI/BEAM Relay, ABS, DRL, EPS, IBCM1, IBCM2, LT HI BEAM, LT LOW BEAM, PCM, RT HI BEAM, RT LOW BEAM, TCM Fuses
Underhood Fuse Block, RUN/CRANK Relay, ABS, IGN 1, INJ, PCM IGN 1, and TRANS Fuses
G109
Figure 2:

Brake Pedal Position Sensor, Traction Control Switch and Data Link Communications


Object Number: 1637899  Size: FS
Master Electrical Component List
ABS Description and Operation
Control Module References
Power, Ground, Brake Pressure Modulator Valve and Wheel Speed Sensors
Low Speed Serial Data
Power, Ground, Class 2 and High Speed Serial Data
G304 and G305