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

Power, Ground and EBCM/EBTCM


Object Number: 483529  Size: FS
Figure 2:

Serial Data, SP205, PCM, BCM, Instrument Cluster, and EBCM/EBTCM


Object Number: 483532  Size: FS
Figure 3:

Stop Lamp Switch Input and Torque Circuits


Object Number: 483533  Size: FS
Figure 4:

Wheel Speed Sensors and EBCM/EBTCM


Object Number: 483535  Size: FS