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

Power, Ground, and Serial Data


Object Number: 2053268  Size: FS
Figure 2:

Lighting References (1 of 2)


Object Number: 2053270  Size: FS
Figure 3:

Lighting References (2 of 2)


Object Number: 2053273  Size: FS
Figure 4:

Subsystem References (1 of 2)


Object Number: 2053275  Size: FS
Figure 5:

Subsystem References (2 of 2)


Object Number: 2053280  Size: FS