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

Dimming Supply Voltage


Object Number: 896344  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
I/P Backlighting
G201, 1 of 2
G302-1 of 2, G303, and G304
TRLR-E BRK,STOP, BLOWER, CIGAR, W/S WASH, A/C, FOG LAMP, PCM B Buses) Fuses
Figure 2:

I/P Backlighting


Object Number: 840234  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
I/P Indicators
Dimming Supply Voltage
SIR Caution for Zoning
G201, 1 of 2
G201-2 of 2, G305, G306
I/P Indicators
Dimming Supply Voltage
Headlamp Switch
Figure 3:

I/P Indicators


Object Number: 686920  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
I/P Backlighting
G201, 1 of 2
I/P Backlighting
Driver Door Module
Data Link Connector