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

Inside Rearview Mirror - Compass


Object Number: 2085351  Size: FS
Master Electrical Component List
Compass Calibration and Magnetic Variance
Control Module References
Figure 2:

Boost Gage (LNF)


Object Number: 2158170  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Figure 3:

Driver Information Center (DIC)(UAF)


Object Number: 2178499  Size: FS
Master Electrical Component List
Control Module References