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

Headlamp Switch and Ambient Light Sensor


Object Number: 586905  Size: FS
Lighting Systems Components
Headlights/Daytime Running Lights (DRL) Circuit Description
High and Low Beams
Power Distribution Schematics
Ground Distribution Schematics
Headlight Doors Schematics
Headlight Doors Schematics
Interior Lights Schematics
Interior Lights Dimming Schematics
Exterior Lights Schematics
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
High and Low Beams
High and Low Beams
Figure 2:

High and Low Beams


Object Number: 586908  Size: FS
HVAC Components
DRL Domestic and Export
Headlamp Switch and Ambient Light Sensor
Ground Distribution Schematics
Ground Distribution Schematics
Headlamp Switch and Ambient Light Sensor
Figure 3:

DRL Domestic and Export


Object Number: 586910  Size: FS
Lighting Systems Components
Headlights/Daytime Running Lights (DRL) Circuit Description
High and Low Beams
Power Distribution Schematics
Ground Distribution Schematics
Ground Distribution Schematics
Ground Distribution Schematics
Ground Distribution Schematics
Interior Lights Schematics
Exterior Lights Schematics
Instrument Cluster: Analog Schematics
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice