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

Class 2 Signals


Object Number: 642284  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Dimming Control
Class 2 Serial Data Line (LH Drive) (1 of 2)
Figure 2:

Dimming Control


Object Number: 796033  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Ashtray Lamp and Steering Wheel Controls
Class 2 Signals
Temperature Sensors - LH Drive
DIC and Headlamp Switch
Low Beam Headlamps (Generation 3.0)
Low Beam Headlamps (Generation 2.5)
Low Beam Headlamps (Generation 2.5)
Battery Feed to Fuse Block - Rear
Battery Feed to Fuse Block - Rear
Figure 3:

Ashtray Lamp and Steering Wheel Controls


Object Number: 783685  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
DIC and Headlamp Switch
Dimming Control
G200
Steering Wheel Controls (LH Drive)
DIC and Headlamp Switch
Figure 4:

DIC and Headlamp Switch


Object Number: 783686  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Steering Wheel Controls (LH Drive)
Ashtray Lamp and Steering Wheel Controls
G201 2 of 3
G201 2 of 3
Dimming Control
Ashtray Lamp and Steering Wheel Controls
Dimming Control
Figure 5:

Steering Wheel Controls


Object Number: 757667  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Front Door Dimming
DIC and Headlamp Switch
G200
G200
Ashtray Lamp and Steering Wheel Controls
Figure 6:

Front Door Dimming


Object Number: 783688  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Rear Door Dimming
Power and Ground
Power Door Serial Data
Figure 7:

Rear Door Dimming


Object Number: 642292  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Front Door Dimming
Power Door Serial Data