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

Cell 21: PCM Power and Grounds


Object Number: 381075  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: MIL Control, DLC
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Power Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Power Distribution Schematics
Figure 2:

Cell 21: MIL Control, DLC


Object Number: 381076  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Ignition Control Module
Cell 21: PCM Power and Grounds
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Power Distribution Schematics
Instrument Cluster: Analog Schematics
Power Distribution Schematics
Powertrain Control Module Connector End Views
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Data Link Connector Schematics
Handling ESD Sensitive Parts Notice
Figure 3:

Cell 21: Ignition Control Module


Object Number: 381077  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Fuel Pump Control, Theft Deterrent
Cell 21: MIL Control, DLC
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Power Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Figure 4:

Cell 21: Fuel Pump Control, Theft Deterrent


Object Number: 381078  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Fuel Injectors
Cell 21: Fuel Injectors
OBD II Symbol Description Notice
Power Distribution Schematics
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Figure 5:

Cell 21: Fuel Injectors


Object Number: 381079  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: IAT, ECT, TP, MAP Sensors
Cell 21: Fuel Pump Control, Theft Deterrent
OBD II Symbol Description Notice
Power Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 6:

Cell 21: IAT, ECT, TP, MAP Sensors


Object Number: 381080  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Converter Heated Oxygen Sensors
Cell 21: Fuel Injectors
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Cell 21: Converter Heated Oxygen Sensors
Cell 21: Converter Heated Oxygen Sensors
Cell 21: Converter Heated Oxygen Sensors
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 7:

Cell 21: Converter Heated Oxygen Sensors


Object Number: 381082  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Front, Rear Heated Oxygen Sensors
Cell 21: IAT, ECT, TP, MAP Sensors
OBD II Symbol Description Notice
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Figure 8:

Cell 21: Front, Rear Heated Oxygen Sensors


Object Number: 381083  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: MAF, EGR, EVAP Purge, F/T Pressure Sensor
Cell 21: Converter Heated Oxygen Sensors
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Power Distribution Schematics
Power Distribution Schematics
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Figure 9:

Cell 21: MAF, EGR, EVAP Purge, F/T Pressure Sensor


Object Number: 381081  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: PSP, IAC Valve, Coolant Level Switch
Cell 21: IAT, ECT, TP, MAP Sensors
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Cell 21: Front, Rear Heated Oxygen Sensors
Power Distribution Schematics
Cell 21: Front, Rear Heated Oxygen Sensors
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 10:

Cell 21: PSP, IAC Valve, Coolant Level Switch


Object Number: 381084  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Cruise Control Module
Cell 21: MAF, EGR, EVAP Purge, F/T Pressure Sensor
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 11:

Cell 21: Cruise Control Module


Object Number: 381085  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Engine Oil Level Switch, Generator, EBTCM
Cell 21: PSP, IAC Valve, Coolant Level Switch
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Figure 12:

Cell 21: Engine Oil Level Switch, Generator, EBTCM


Object Number: 381088  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: TCC Switch, Transaxle Solenoids
Cell 21: Cruise Control Module
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 13:

Cell 21: TCC Switch, Transaxle Solenoids


Object Number: 381086  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Transaxle - Sensors and TR Switch
Cell 21: Cruise Control Module
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Cruise Control Schematics
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Figure 14:

Cell 21: Transaxle -- Sensors and TR Switch


Object Number: 381087  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: PNP Switch, Shift Select Switch
Cell 21: TCC Switch, Transaxle Solenoids
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Cell 21: TCC Switch, Transaxle Solenoids
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 15:

Cell 21: PNP Switch, Shift Select Switch


Object Number: 381089  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: A/C Sensors
Cell 21: Transaxle - Sensors and TR Switch
OBD II Symbol Description Notice
Ground Distribution Schematics
Ground Distribution Schematics
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 16:

Cell 21: A/C Sensors


Object Number: 381091  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: A/C Compressor Controls
Cell 21: PNP Switch, Shift Select Switch
OBD II Symbol Description Notice
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 17:

Cell 21: A/C Compressor Controls


Object Number: 381090  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: Cooling Fans
Cell 21: PNP Switch, Shift Select Switch
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Powertrain Control Module Connector End Views
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice
Figure 18:

Cell 21: Cooling Fans


Object Number: 381092  Size: FS
Engine Controls Components
Powertrain Control Module Description
Cell 21: A/C Compressor Controls
OBD II Symbol Description Notice
Power Distribution Schematics
Power Distribution Schematics
Powertrain Control Module Connector End Views
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice