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

Daytime Running Lamps (DRL) Control Module Power and Ground, Ambient Light Sensor


Object Number: 1847876  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Turn Signal/Headlamp Switch
Air Pump, ETCS, Head, ALTS, EF1 Hazard EF2 Fuses
Charge, Air Bag, Malfunction, O/D Off, Cruise Indicators
Air Pump, ETCS, Head, ALTS, EF1 Hazard EF2 Fuses
Air Pump, ETCS, Head, ALTS, EF1 Hazard EF2 Fuses
Figure 2:

Turn Signal/Headlamp Switch


Object Number: 1426490  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Headlamps
Daytime Running Lamps (DRL) Control Module, Ambient Light Sensor
Multifunction Alarm Module, Horn, Hazard, Turn Signal/Headlamp Switches
G100, G101, G102
Figure 3:

Headlamps


Object Number: 1426499  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Turn Signal/Headlamp Switch
Air Pump, ETCS, Head, ALTS, EF1 Hazard EF2 Fuses