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

Power, Ground, and Serial Data


Object Number: 1333231  Size: FS
Figure 2:

Lighting and Wiper/Washer References


Object Number: 1333232  Size: FS
Figure 3:

Controlled/Monitored Subsystem References


Object Number: 1333233  Size: FS