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

I/P Lamp Dimmer


Object Number: 1666859  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
Illumination Lamps
Power, AM 1, Door, Tail, P/Point, ECU-B, Stop, OBD, INV Fuses
Tail Relay, Turn Signal/Headlamp Switch
Junction Block Instrument Panel - Left
SP200 and G200
Figure 2:

Illumination Lamps


Object Number: 1426639  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
IP Lamp Dimmer
SP200 and G200