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

Power, Ground, Serial Data, and Odometer


Object Number: 1874872  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Indicators
Figure 2:

Indicators


Object Number: 1874874  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Control Module References
Gages
Power, Ground, Serial Data, Odometer
Figure 3:

Gages


Object Number: 1874877  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Indicators