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

Power, Ground, and Class 2


Object Number: 879899  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Instrument Cluster Schematics-PCM Signals
Power Distribution Schematics-IGN 1 Relay,SIR,Vent Sol and Ignition 1 Fuses
Power Distribution Schematics-IGN 1 Relay,SIR,Vent Sol and Ignition 1 Fuses
Power Distribution Schematics-ALDL, PCM Battery, I/P, ABS Fuses
Ground Distribution Schematics-G200
Ground Distribution Schematics-G200
Interior Lights Dimming Schematics-Class 2 Signals
Wiper/Washer System Schematics-Washer Fluid level Switches
Engine Cooling Schematics-Engine Coolant Level Indicator
Figure 2:

PCM Signals


Object Number: 1220840  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Instrument Cluster Schematics-PCM and IPM Signals
Instrument Cluster Schematics-Power, Ground and Class 2
Engine Controls Schematics-Fuel Controls, Fuel Pump, and EVAP Controls
Data Link Connector (DLC) Schematics-Serial Data Line (LH Drive) (1 of 2)
Figure 3:

PCM and IPM Signals


Object Number: 1220848  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Instrument Cluster Schematics-DIM, RIM, and SDM Signals
Instrument Cluster Schematics-PCM Signals
Power Distribution Schematics-IGN 1 Relay,SIR,Vent Sol and Ignition 1 Fuses
Power Distribution Schematics-IGN 1 Relay,SIR,Vent Sol and Ignition 1 Fuses
ABS Schematics-Traction Control Switch and ABS Indicators
Brake Warning System Schematics
Brake Warning System Schematics
Data Link Connector (DLC) Schematics-Serial Data Line (LH Drive) (1 of 2)
Engine Controls Schematics-Module Power,Ground,Serial Data and MIL
Ground Distribution Schematics-G106
Figure 4:

DIM, RIM, PCM, and SDM Signals


Object Number: 642220  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Instrument Cluster Schematics-Driver Information Center (DIC)
Instrument Cluster Schematics-PCM and IPM Signals
Data Link Connector (DLC) Schematics-Serial Data Line (LH Drive) (1 of 2)
Exterior Lights Schematics-Park Lamp Relay and Class 2
Exterior Lights Schematics-Park Lamp Relay and Class 2
Figure 5:

Driver Information Center (DIC)


Object Number: 792024  Size: FS
Master Electrical Component List
Driver Information Center (DIC) Description and Operation
Instrument Cluster Schematics-DIM, RIM, and SDM Signals
Ground Distribution Schematics-G200
Ground Distribution Schematics-G200
Ground Distribution Schematics-G201 (1 of 5)
Ground Distribution Schematics-G201 (1 of 5)