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

Headlights/DRL Controls


Object Number: 861090  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Headlights
G203-3 of 3
Park Lamp Relay - Domestic
Sun Load and Ambient Light Sensors
G203-1 of 3
G203-1 of 3
Figure 2:

Headlights


Object Number: 861092  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Daytime Running Lamps (DRL) - Domestic
Headlights/DRL Control
G104, G106, G107
G104, G106, G107
G104, G106, G107
G100, G101, G105
G100, G101, G105
Figure 3:

Daytime Running Lamps (DRL) - Domestic


Object Number: 861094  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Daytime Running Lamps (DRL) - Export
Headlights
B+ Bus Bar (Gas) - 1 of 3
G100, G101, G105
G100, G101, G105
G100, G101, G105
Figure 4:

Daytime Running Lamps (DRL) - Export


Object Number: 861096  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Daytime Running Lamps (DRL) - Domestic
Park Lamp Relay - Export
Front Park Lamps - Export
Front Park Lamps - Export
S100-Export
S101-Export
G100, G101, G105