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

Power, Ground, and Class 2


Object Number: 885752  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
PCM Signals - Speedometer, Tachometer, and Fuel Indicators
IGN-1, VENT SOL, and SIR Fuses
I/P and CIGAR Fuses
Serial Data Class 2
IGN-1, VENT SOL, and SIR Fuses
I/P and CIGAR Fuses
G200
G200
G201 - 1 of 2
G201 - 1 of 2
Figure 2:

PCM Signals - Speedometer, Tachometer, and Fuel Indicators


Object Number: 1263033  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
PCM Signals - Engine Oil and Volt Indicators
Power, Ground, and Class 2
Fuel Sensor and EVAP Solenoid Controls
Serial Data Class 2
Figure 3:

PCM Signals - Engine Oil and Volt Indicators


Object Number: 1263411  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
DIM, PCM, and EBCM Signals - Traction, ABS, Brake, Battery and MIL Indicators
PCM Signals - Speedometer, Tachometer, and Fuel Indicators
G108, G110, and G111 - 4.6L
Serial Data Class 2
Figure 4:

DIM, PCM, and EBCM Signals - Traction, ABS, Brake, Battery, and MIL Indicators


Object Number: 1263507  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
DIM, RIM, and PCM Signals - Seat Belt, High Beam, Air Bag, and Turn Signal Indicators
PCM Signals - Engine Oil and Volt Indicators
IGN-1, VENT SOL, and SIR Fuses
IGN-1, VENT SOL, and SIR Fuses
Indicators and the Traction Control Switch
Brake Warning System Schematic
Brake Warning System Schematic
PCM Power, Ground, Serial Data and MIL
PCM Power, Ground, Serial Data, and MIL
Figure 5:

DIM, RIM, and PCM Signals - Seat Belt, High Beam, Air Bag, and Turn Signal Indicators


Object Number: 1364676  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Systems Monitor - Washer Fluid, Check Oil Levels, Check Gages, Tire Pressure, Door and Trunk Ajar Indicators
DIM, PCM, and EBCM Signals - Traction, ABS, Brake, Battery and MIL Indicators
Turn Signal Lamps and Indicators
Figure 6:

Systems Monitor - Washer Fluid, Check Oil Level, Check Gages, Tire Pressure, Door and Trunk Ajar Indicator


Object Number: 766465  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Compass
DIM, RIM, and PCM Signals - Seat Belt, High Beam, Air Bag, and Turn Signal Indicators
Wiper/Washer Motors
Figure 7:

Compass


Object Number: 885762  Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
DIC Switch (U50)
Systems Monitor - Washer Fluid, Check Oil Levels, Check Gages, Tire Pressure, Door and Trunk Ajar Indicators
IGN3 RR, and ABS Fuses (Fuse Block Rear)
Defogger Schematic (CJ2)
IGN3 RR and ABS Fuses
G302
G302
Figure 8:

DIC Switch (U50)


Object Number: 1364679  Size: FS
Master Electrical Component List
Driver Information Center (DIC) Description and Operation
DIC Switch (U2F)
Compass
Serial Data Class 2
Coolant Level Switch - 4.6L
G108, G110, and G111 - 4.6L
I/P and Console Dimming
G104 and G105 - 3.8L
G201 - 1 of 2
G201 - 1 of 2
Figure 9:

DIC Switch (U2F)


Object Number: 766481  Size: FS
Master Electrical Component List
Driver Information Center (DIC) Description and Operation
DIC Switch (U50)
Serial Data Class 2
I/P and Console Dimming
G201 - 1 of 2
G201 - 1 of 2