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

Headlamp and Daytime Running Lamp Controls


Object Number: 1700978  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Low Beam and Daytime Running Lamps - X88/Z88
G201
Front Temperature Controls
G201
Front
Inadvertent Lamp Control
Dimming Control and LED Dimming - 1 of 3
Figure 2:

Low Beam and Daytime Running Lamps - X88/Z88


Object Number: 1700979  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Low Beam and Daytime Running Lamps - Z75
Headlamp and Daytime Running Lamp Controls
B+ Bus - 1 of 3
G100
G101
G100
G101
Figure 3:

Low Beam and Daytime Running Lamps - Z75


Object Number: 1869543  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
High Beams
Low Beam and Daytime Running Lamps - X88/Z88
B+ Bus - 1 of 3
G100
G101
G100
G101
Figure 4:

High Beams


Object Number: 1700980  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Low Beam and Daytime Running Lamps - Z75
B+ Bus - 1 of 3
G100
G101