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

PCM Power, Ground, Serial Data and MIL


Object Number: 885647  Size: FS
Battery Feed to the Fuse Block Underhood
Ignition Switch Positions
Powertrain Control Module Description
OBD II Symbol Description Notice
ABS, PCM BATT Fuses and the Cool Fan 1 Relay (Fuse Block Underhood)
G104 and G105
Master Electrical Component List
Engine Data Sensors 5 Volt and Low Reference
Serial Data Class 2
Figure 2:

Engine Data Sensors - 5 Volt and Low Reference


Object Number: 786270  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors Pressure and Temperature
PCM Power, Ground, Serial Data and MIL
OBD II Symbol Description Notice
Figure 3:

Engine Data Sensors - Pressure and Temperature


Object Number: 766020  Size: FS
Master Electrical Component List
Air Intake System Description
Engine Data Sensors; MAF, VSS and Extended Brake Travel Switch
Engine Data Sensors 5 Volt and Low Reference
OBD II Symbol Description Notice
Figure 4:

Engine Data Sensors - MAF, VSS and Extended Brake Travel Switch


Object Number: 885648  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Heated Oxygen Sensors (HO2S)
Engine Data Sensors Pressure and Temperature
OBD II Symbol Description Notice
G104 and G105
Battery Feed to the Fuse Block Underhood
TRANS, DIS, OXY SEN, IGN 1 Fuses and the IGN-1 and AIR Pump Relays(Fuse Block Underhood)
Speedometer, Tachometer, and Fuel Indicators
Transaxle Inputs
G200
Figure 5:

Heated Oxygen Sensors (HO2S)


Object Number: 885650  Size: FS
Master Electrical Component List
Powertrain Control Module Description
TRANS, DIS, OXY SEN, IGN 1 Fuses and the IGN-1 and AIR Pump Relays(Fuse Block Underhood)
G100 and G102
Ignition Controls
Engine Data Sensors; MAF, VSS and Extended Brake Travel Switch
OBD II Symbol Description Notice
Figure 6:

Ignition Controls


Object Number: 885652  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
TRANS, DIS, OXY SEN, IGN 1 Fuses and the IGN-1 and AIR Pump Relays(Fuse Block Underhood)
Fuel Pump Controls
Heated Oxygen Sensors (HO2S)
OBD II Symbol Description Notice
Speedometer, Tachometer, and Fuel Indicators
Figure 7:

Fuel Pump Controls


Object Number: 885653  Size: FS
Master Electrical Component List
Fuel System Description
Battery Voltage to the Rear Fuse Block
G401 (1 of 2)
Battery Feed to the Fuse Block Underhood
TRANS, DIS, OXY SEN, IGN 1 Fuses and the IGN-1 and AIR Pump Relays(Fuse Block Underhood)
G302
Fuel Injectors
Ignition Controls
OBD II Symbol Description Notice
Serial Data Class 2
Speedometer, Tachometer, and Fuel Indicators
Figure 8:

Fuel Injectors


Object Number: 885654  Size: FS
Master Electrical Component List
Fuel System Description
INJR 2, PCM IGN, CR CONT, INJR 1 Fuses and the START 2 Relay (Fuse Block Underhood)
Fuel Sensor and EVAP Solenoid Controls
Fuel Pump Controls
OBD II Symbol Description Notice
Figure 9:

Fuel Sensor and EVAP Solenoid Controls


Object Number: 885655  Size: FS
Master Electrical Component List
Evaporative Emission Control System Description
Speedometer, Tachometer, and Fuel Indicators
Device Controls
Fuel Injectors
OBD II Symbol Description Notice
Compressor Controls
Compressor Controls w/CJ2
IGN 1, Vent Sol, and SIR Fuses (Fuse Block Rear)
Battery Feed to the Fuse Block Underhood
TRANS, DIS, OXY SEN, IGN 1 Fuses and the IGN-1 and AIR Pump Relays(Fuse Block Underhood)
Figure 10:

Device Controls


Object Number: 869701  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem References
Fuel Sensor and EVAP Solenoid Controls
OBD II Symbol Description Notice
Figure 11:

Controlled/Monitored Subsystem References


Object Number: 766025  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Compressor Controls w/CJ2
PCM Signals Boost, Engine Oil, and Volt Indicators
Engine Cooling Schematic
Generator Control
DIC Switch (w/U50)
Cruise Control Module and VSS
Transmission Controls
Device Controls
OBD II Symbol Description Notice
Figure 12:

Transmission Controls


Object Number: 879281  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Power to the Transaxle and Solenoid Controls
Internal Mode Switch Inputs
Traction Control (NW9)
Transaxle Inputs
Controlled/Monitored Subsystem References
OBD II Symbol Description Notice