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

Headlamps


Object Number: 1576867  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Daytime Running Lamps (DRL)
Dome and Courtesy Lamp Switch Signals and Door Latch Assemblies
Park Lamp Relay Control and Front Park Lamps
I/P Dimming Supply Voltage - 1 of 3 and LED Dimming Supply Voltage
Power, Ground, DLC, and Splice Pack SP200
B+ Bus - Underhood Fuse Block - Gas
G302
G302
G100 and G101
G100 and G101
Figure 2:

Daytime Running Lamps (DRL)


Object Number: 1576868  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Control Module References
Headlamps
Park Lamp Relay Control and Front Park Lamps
Dome and Courtesy Lamp Switch Signals and Door Latch Assemblies
I/P Dimming Supply Voltage - 1 of 3 and LED Dimming Supply Voltage
G302
Power, Ground, DLC, and Splice Pack SP200
G100 and G101
G100 and G101