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

Headlamp/DRL Controls


Object Number: 1892788  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Headlamps
Figure 2:

Headlamps


Object Number: 1892790  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Headlamp/DRL Controls