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

Power , Ground and Class 2


Object Number: 886651  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gages
Fuse Block Rear - IGN-1, VENT SOL and SIR Fuses
Fuse Block Rear - I/P, CIGAR, AUX PWR and C/LTR Fuses and CIGAR Relay
Serial Data Class 2
Fuse Block Rear - IGN-1, VENT SOL and SIR Fuses
Fuse Block Rear - I/P, CIGAR, AUX PWR and C/LTR Fuses and CIGAR Relay
G200 - 1 of 2
G200 - 2 of 2
G200 - 2 of 2
Figure 2:

Gages


Object Number: 803868  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Indicators
Power, Ground and Class 2
Head Up Display
CCM, PCM Controls and Vehicle Speed Input
Serial Data Class 2
Engine Data Sensors - 5 Volt and Low Reference
Figure 3:

Indicators


Object Number: 1545398  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Gages
Drivers Side Exterior Lamps
Passengers Side Exterior Lamps
Indicators and Traction Control Switch
Brake Warning System
Serial Data Class 2
Wiper and Washer Motor, Outside Moiture Sensor
Module Power, Ground, Serial Data and MIL
G104 and G105