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

Powertrain Control Module (PCM) Power and Ground


Object Number: 1666789  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Park/Neutral Position Switch
Automatic Transmission Schematic Icons
Horn, Dome, Main, Amp, OnStar Fuses
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
Ignition Switch 1 of 2
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
Fuel Injectors
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
S100
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
SP107, SP108, G104
SP107, SP108, G104
S103, G103
SP107, SP108, G104
S105, G105, G106, G107, G108
SP201 and G201
Figure 2:

Park/Neutral Position Switch


Object Number: 1666807  Size: FS
Master Electrical Component List
Transmission General Description
Control Module References
Park/Neutral Position Switch, Brake Pressure Modulator Valve (BPMV), Multifunction Alarm Module
Powertrain Control Module (PCM) Power and Ground
Automatic Transmission Schematic Icons
Ignition Switch 1 of 2
Wash, RR WIP, Wiper, ECU-IG, Gage, Heater, DEF Fuses
P/W Relay, SP109, S230
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
Air Pump, ETCS, Head, Alt S, EFI, Hazard EFI 2 Fuses
Back Up Lamps
Starting System
Figure 3:

Park/Neutral Position Switch, Brake Pressure Modulator Valve (BPMV), Multifunction Alarm Module


Object Number: 1481319  Size: FS
Master Electrical Component List
Transmission General Description
Control Module References
Automatic Transaxle Controls (FWD)
Park/Neutral Position Switch
Automatic Transmission Schematic Icons
Figure 4:

Automatic Transaxle Controls (FWD)


Object Number: 1422223  Size: FS
Master Electrical Component List
Transmission General Description
Control Module References
Vehicle Speed Signal and Overdrive Switch
Park/Neutral Position Switch, Brake Pressure Modulator Valve (BPMV), Multifunction Alarm Module
Automatic Transmission Schematic Icons
Figure 5:

Vehicle Speed Signal and Overdrive Switch


Object Number: 1424553  Size: FS
Master Electrical Component List
Transmission General Description
Control Module References
Automatic Transaxle Controls (FWD)
Automatic Transmission Schematic Icons
Wash, RR WIP, Wiper, ECU-IG, Gage, Heater, DEF Fuses
Ignition Switch 1 of 2
Ignition Switch 1 of 2
Ignition Switch 2 0f 2
Junction Block - Instrument Panel Right
High Beam Door Open, Engine Coolant Temperature (ECT) Indicators
Charge, Air Bag, Malfunction, O/D OFF, Cruise Indicators
Junction Block - Instrument Panel Right
SP107, SP108, G104
Junction Block Instrument Panel - Right
SP107, SP108, G104
SP201 and G201