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

Power, Ground and Serial Data


Object Number: 787943  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gauges
Fuse Block-I/P CIG, HORN, LT HDLP, CLSTR, EXT LP, FOG Fuses, and HDLP Circuit Breaker
Fuse Block-I/P TURN-B/U, IGN MDL, PCM, and BCM/CLU Fuses
Fuse Block-I/P CIG, HORN, LT HDLP, CLSTR, EXT LP, FOG Fuses, and HDLP Circuit Breaker
Fuse Block-I/P TURN-B/U, IGN MDL, PCM, and BCM/CLU Fuses
G110
Data Link Communications
Figure 2:

Gages


Object Number: 860499  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Indicator Lights and EOP
Power, Ground and Serial Data
Engine Data Sensors-Pressure and Temperature
Data Link Communications
Figure 3:

Indicator Lights and EOP


Object Number: 860502  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Gauges
Lamp Controls, Rear Turn Lamps, and Indicators
Interior Controls Illumination Lamps
Data Link Communications
Module Power, Ground, Serial Data and MIL
Theft Deterrent
G204 2 of 2