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

Headlamp and Daytime Running Lamp Controls


Object Number: 1883753  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Low Beam and Daytime Running Lights (DRL)
Figure 2:

Low Beam and Daytime Running Lamps (DRL)


Object Number: 1883756  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
High Beams
Headlamp and Daytime Running Lamp Controls
Figure 3:

High Beams


Object Number: 1925481  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Low Beam and Daytime Running Lights (DRL)