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

PWR, GND, and Ambient Light Sensor


Object Number: 581197  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Headlamp Switch
BODY 3 and INADVERT Fuses
LAMPS and IGN 1 Fuses
BATT 3 Fuse and Ignition Switch (1 of 2)
WIPERS, ACC, and CLUSTER Fuses
RLY IGN 1 Fuse
G203
IGN 0 BODY Fuse
Handling ESD Sensitive Parts Notice
Figure 2:

Headlamp Switch


Object Number: 581217  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Front Door Backlighting
PWR, GND, and Ambient Light Sensor
G201
Class 2 (2 of 2)
Handling ESD Sensitive Parts Notice
Figure 3:

Front Door Backlighting


Object Number: 581259  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Instrument Panel Backlighting
Headlamp Switch
Handling ESD Sensitive Parts Notice
G201
G204
Figure 4:

Instrument Panel Backlighting


Object Number: 581260  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Console Backlighting
Front Door Backlighting
Class 2 (2 of 2)
Class 2 (2 of 2)
G201
G401 (1 of 2)
G204
Console Backlighting
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
SIR Caution
SIR Caution
Figure 5:

Console Backlighting


Object Number: 581262  Size: FS
Lighting Systems Components
Interior Lights Dimming Circuit Description
Instrument Panel Backlighting
Instrument Panel Backlighting
G302 (1 of 2)
Handling ESD Sensitive Parts Notice