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

Power, Ground, and 54V VF Display Supply


Object Number: 798189  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gages
Fuse Block- SIR, VENT SOL, IGN 1Fuse
Underhood Fuse Block- ALDL, PCM BATT, and I/P Fuse
Fuse Block- SIR, VENT SOL, IGN 1Fuse
G200
G200
Class 2 Communication
Figure 2:

Gages and Class 2


Object Number: 798190  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Brakes and Engine Indicators
Power, Ground, Class 2 and 54 V, and VF Display Supply
Engine Data Sensors- MAF, VSS and Extended Brake Travel Switch
Class 2 Serial Data (1 of 3)
Engine Data Sensors- 5 Volt and Low Reference
Figure 3:

Brakes and Engine Indicators


Object Number: 798191  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Lighting, Restraints, Security and Cruise Indicators
Gages
Fuse Block- SIR, VENT SOL, IGN 1Fuse
Fuse Block- SIR, VENT SOL, IGN 1Fuse
Indicators and Traction Control Switch
Brake Warning System
Parking Brake System Schematic
Class 2 Serial Data (1 of 3)
G100
PCM Power, Ground, Class 2 and MIL
Figure 4:

Lighting, Restraints, Security, and Cruise Indicators


Object Number: 798192  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Driver Information Center
Brakes and Engine Indicators
Front Park/Turn and Repeater Lamps
Front Park/Turn and Side Marker Lamps
Front Park/Turn and Side Marker Lamps
Front Park/Turn and Side Marker Lamps
Figure 5:

Driver Information Center


Object Number: 798193  Size: FS
Master Electrical Component List
Driver Information Center (DIC) Description and Operation
Lighting, Restraints, Security and Cruise Indicators
Coolant Level Switch Signal
Windshield Washer Fluid Level Switch
G201 (2 of 3)