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

Headlights/DRL Control


Object Number: 1521997  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Headlights
G203 - 2 of 2
G203 - 2 of 2
Air Temperature Actuators Left and Right
G203 - 2 of 2
Headlights
Headlights
G203 - 2 of 2
G203 - 1 of 2
Figure 2:

Headlights


Object Number: 1521999  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Daytime Running Lamps (DRL)
Headlights/DRL Control
B+ Bar Bus
Headlights/DRL Control
Headlights/DRL Control
G104, G106, G107 and G110
G104, G106, G107 and G110
G100, G101, and G102
Figure 3:

Daytime Running Lamps (DRL)


Object Number: 1522000  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Headlights
B+ Bar Bus
G100, G101, and G102
G100, G101, and G102