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

DLC, Ground, Indicators, and Power


Object Number: 1772418  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Gages
BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay
BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay
Hydraulic Brakes Schematics
Park Lamp Control, Front Marker, Park and Position Lamps
Hazard, Stop Lamps, and Turn Signal Inputs
DLC, Ground, MIL and Power
DLC, Ground, MIL, and Power
G201
Pumps and Switches
Class 2
Figure 2:

Gages


Object Number: 1772421  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Messages
DLC, Ground, Indicators and Power
Engine Data Sensors - Low Reference
Low Reference Bussing
Class 2
GMLAN - A/T
GMLAN - M/T
G302, G401, and G402
Engine Data Sensors - Pressure, Temperature, MAF, VSS, and Extended Brake Travel
Engine Data Sensors - Pressure, Temperature, IAT/MAF, VSS and Brake Travel
Figure 3:

Messages


Object Number: 1772422  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Gages
DIC, Dimmer Controls, IPC and Switches
Class 2