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

Power, Ground, Serial Data, and Controlled/Monitored Subsystem References


Object Number: 1907515  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Theft, Horn, Mirror, Power Moding, Brake and Wiper/Washer System References
Figure 2:

Theft, Horn, Mirror, Power Moding, Brake and Wiper/Washer System References


Object Number: 1907518  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Interior Lights and Interior Lights Dimming References
Power, Ground, Serial Data and Controlled/Monitored Subsystem References
Figure 3:

Interior Lights and Interior Lights Dimming References


Object Number: 1907519  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Exterior Lighting References
Theft, Horn, Mirror, Power Moding, Brake and Wiper/Washer System References
Figure 4:

Exterior Lighting References


Object Number: 1907520  Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Interior Lights and Interior Lights Dimming References