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

PCM Power and Ground


Object Number: 520701  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
DLC and MIL
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Ignition Switch
Rear Fuse Block Battery Voltage
RR BLO, RRDR MDL, HVAC BLO, STOP LP, IGN SW, and TSIG/HAZ Fuses
RR BLO, RRDR MDL, HVAC BLO, STOP LP, IGN SW, and TSIG/HAZ Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Ignition Switch
Starting and Charging Schematics
Underhood Fuse Block Battery Voltage
START Circuit Breaker, PCM IGN and IGN1 Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Powertrain Control Module Connector End Views
G100
Figure 2:

DLC and MIL


Object Number: 520702  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Ignition Control Module - Front Bank
PCM Power and Ground
OBD II Symbol Description Notice
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Underhood Fuse Block Battery Voltage
Handling ESD Sensitive Parts Notice
Instrument Panel, Gages, and Console Connector End Views
G200
HDHIBML, HDHIBMR, ALDL, PCM BATT, IP Fuses
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
G201 - Steering Column
G201 - IP Harness
G200
Data Link Connector Schematics
Figure 3:

Ignition Control Module -- Front Bank


Object Number: 520703  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Ignition Control Module - Rear Bank
DLC and MIL
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G102 - G110
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
OXY SEN, CR CONT, MDL COIL, TRANS Fuses
OXY SEN, CR CONT, MDL COIL, TRANS Fuses
Figure 4:

Ignition Control Module -- Rear Bank


Object Number: 520704  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Fuel Control
Ignition Control Module - Front Bank
OBD II Symbol Description Notice
G102 - G110
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Instrument Panel, Gages, and Console Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
OXY SEN, CR CONT, MDL COIL, TRANS Fuses
OXY SEN, CR CONT, MDL COIL, TRANS Fuses
Figure 5:

Fuel Control


Object Number: 520705  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Fuel Injectors
Ignition Control Module - Rear Bank
OBD II Symbol Description Notice
G301
G100
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
G402 - Backup Lamps
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Rear Fuse Block Battery Voltage
Figure 6:

Fuel Injectors


Object Number: 520706  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Sensors
Fuel Control
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
INJ 2 and INJ 1 Fuses
Figure 7:

Sensors


Object Number: 520707  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Heated Oxygen Sensors (HO2S)
Fuel Injectors
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Figure 8:

Heated Oxygen Sensors (HO2S)


Object Number: 520708  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
EVAP Valves, EGR Valve
Sensors
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
OXY SEN, CR CONT, MDL COIL, TRANS Fuses
Figure 9:

EVAP Valves, EGR Valve


Object Number: 520709  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
MAF/IAT Sensor and IAC Valve
Heated Oxygen Sensors (HO2S)
OBD II Symbol Description Notice
SIR, VENT SOL, and IGN 1 Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
START Circuit Breaker, PCM IGN and IGN1 Fuses
START Circuit Breaker, PCM IGN and IGN1 Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 10:

MAF/IAT Sensor and IAC Valve


Object Number: 520710  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Cruise Control and Vehicle Speed Signal
EVAP Valves, EGR Valve
OBD II Symbol Description Notice
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
START Circuit Breaker, PCM IGN and IGN1 Fuses
START Circuit Breaker, PCM IGN and IGN1 Fuses
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
G100
Figure 11:

Cruise Control and Vehicle Speed Signal


Object Number: 520711  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
A/C Clutch, A/C Pressure Sensor and Other Controls
MAF/IAT Sensor and IAC Valve
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
OXY SEN, CR CONT, MDL COIL, TRANS Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Powertrain Control Module Connector End Views
G101
Handling ESD Sensitive Parts Notice
Figure 12:

A/C Clutch, A/C Pressure Sensor and Other Controls


Object Number: 520712  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Automatic Transaxle - Solenoids, ABS/TCC Switch
Cruise Control and Vehicle Speed Signal
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Ignition Feed to Underhood and Rear Fuse Blocks
DRL, FOG, AC CLU, ACCY, WIPER Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
HVAC Compressor Control Schematics
Powertrain Control Module Connector End Views
G100
Suspension Controls Connector End Views
Figure 13:

Automatic Transaxle -- Solenoids, ABS/TCC Switch


Object Number: 520713  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Automatic Transaxle - Sensors
A/C Clutch, A/C Pressure Sensor and Other Controls
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Cruise Control Schematics
SIR, VENT SOL, and IGN 1 Fuses
SIR, VENT SOL, and IGN 1 Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
OXY SEN, CR CONT, MDL COIL, TRANS Fuses
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
Figure 14:

Automatic Transaxle -- Sensors


Object Number: 520714  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Automatic Transaxle - IMS Switch and VSS
Automatic Transaxle - Solenoids, ABS/TCC Switch
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Figure 15:

Automatic Transaxle -- IMS Switch and VSS


Object Number: 520715  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Secondary AIr Injection (AIR) Pump Motors w/NB6 - California Emissions
Automatic Transaxle - Sensors
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
G100
Figure 16:

Secondary AIr Injection (AIR) Pump Motors w/NB6 -- California Emissions


Object Number: 520716  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Engine Cooling Fan Motors
Automatic Transaxle - IMS Switch and VSS
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch
START Circuit Breaker, PCM IGN and IGN1 Fuses
START Circuit Breaker, PCM IGN and IGN1 Fuses
Underhood Fuse Block Battery Voltage
Powertrain Control Module Connector End Views
Figure 17:

Engine Cooling Fan Motors


Object Number: 520717  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Secondary AIr Injection (AIR) Pump Motors w/NB6 - California Emissions
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Underhood Fuse Block Battery Voltage
Powertrain Control Module Connector End Views
G104 - Relays, Horns and Other Items
Power and Grounding Connector End Views Fuse Blocks and Ignition Switch