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

Power, Ground, Serial Data and Driver Information Controls


Object Number: 1251371  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Indicators
B+ Bus - 1 of 2
Ignition Switch - ACC/RUN/START, ACC/RUN, and RUN/START Bus Bars
RTD, RR WPR, EAP, SUNROOF Fuses
O2A, O2B, TBC IGN 1, SEO IGN Fuses
G203 - 3 of 3
G203 - 1 of 3
G203 - 1 of 3
SP205 - 1 of 2
Figure 2:

Indicators


Object Number: 1251377  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gages
Power, Ground, Serial Data and Driver Information Control
SP205 - 2 of 2
Pressure Level Switches
G104, G107
G102, G103
G100, G101, G105, G106
Left Turn Signals - Domestic
Left Turn Signals - Export
Right Turn Signals - Domestic
Right Turn Signals - Export
Figure 3:

Gages


Object Number: 1251374  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Vehicle Speed and Speedometer
Indicators
SP205 - 2 of 2
Figure 4:

Vehicle Speed and Speedometer


Object Number: 1338800  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Fuel Gage
Gages
Figure 5:

Fuel Gage


Object Number: 1251379  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Vehicle Speed and Speedometer
SP205 - 2 of 2
Fuel Controls - EVAP Controls and Fuel Tank Pressure
Fuel Controls - EVAP Controls,Fuel Tank Pressure and Fuel Composition