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
Gauges
IGN-1, VENT SOL, and SIR Fuses (Fuse Block Rear)
IP, CIGAR, AUX PWR and C/LTR Fuses and CIGAR Relay (Fuse Block Rear)
Serial Data Class 2
IGN-1, VENT SOL, and SIR Fuses (Fuse Block Rear)
IP, CIGAR, AUX PWR and C/LTR Fuses and CIGAR Relay (Fuse Block Rear)
G200 (1 of 2)
G200 (2 of 2)
G200 (1 of 2)
Figure 2:

Gages


Object Number: 803868  Size: FS
Master Electrical Component List
Indicators
Power, Ground andClass 2
Head up Display Schematic
CCM, PCM Controls and Vehicle Speed Input
Serial Data Class 2
Fuel Controls - Fuel Pump Controls
Figure 3:

Indicators


Object Number: 876992  Size: FS
Passengers Side Exterior Lamps
Master Electrical Component List
DIC Switch (w/U2E)
Gauges
Indicators and Traction Control Switch
Park Brake Switch and Brake Fluid Level Sensor
Serial Data Class 2
Module Power, Ground, Serial Data and MIL