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

Power, Ground, Serial Data, and MIL


Object Number: 1747720  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Gages
B+ Bus - Underhood Fuse Block
Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse
BCK/UP, BTSI, IGN E, TBC IGN 1, and TRLR BCK/UP Fuses
BCK/UP, BTSI, IGN E, TBC IGN 1, and TRLR BCK/UP Fuses
G102
SP205
Wiper/Washer Switch and Washer Fluid Level Switch
Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data, and MIL
Figure 2:

Gages


Object Number: 1747721  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Indicators and DIC Controls
Power, Ground, Serial Data, and MIL
SP205
Figure 3:

Indicators and DIC Controls


Object Number: 1747722  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Fuel Gage
Gages
Left Turn Signals
Right Turn Signals
SP205
Displays and Gages Schematic Icons
G302 - 1 of 2, G303, and G304
I/P Dimming Supply - 2 of 2
G302 - 1 of 2, G303, and G304
I/P Dimming Supply - 2 of 2
Figure 4:

Fuel Gage


Object Number: 1747723  Size: FS