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

Power, Ground, Serial Data, and Power Moding References


Object Number: 2080525  Size: FS
Figure 2:

Antilock Brake, Horn, Theft, and Wiper/Washer References


Object Number: 2080527  Size: FS
Figure 3:

Vehicle Access, Interior Lights, and Interior Lights Dimming References


Object Number: 2080530  Size: FS
Figure 4:

Exterior Lighting References


Object Number: 2080531  Size: FS