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

Power, Grounds, MIL and Serial Data


Object Number: 488636  Size: FS
EXT LTS, A/C RLY (CMPR) and PCM Fuses
ABS/PCM, STOP, TURN SIGNAL and SRS Fuses
G113 - Continued
ABS/PCM, STOP, TURN SIGNAL and SRS Fuses
PCM BCM/CLSTR, PWR MIR, CLSTR/BCM Fuses, RETAINED ACCSRY PWR CIRCUIT Breaker, HEADLAMP and RETAINED ACCSRY PWR Relays
Ignition and Start Switch and A/C CRUISE, A/C FAN, CRUISE, PCM (Crank)and PCM/BCM/CLSTR Fuses
G201 (1 of 2)
G203 (2 of 3)
PCM BCM/CLSTR, PWR MIR, CLSTR/BCM Fuses, RETAINED ACCSRY PWR CIRCUIT Breaker, HEADLAMP and RETAINED ACCSRY PWR Relays
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Data Link Communications Schematic
Engine Controls Components
Powertrain Control Module Description
Ignition System, Knock Sensor
OBD II Symbol Description Notice
Figure 2:

Ignition System, Knock Sensor


Object Number: 488639  Size: FS
FAN CONT #2 & #3, FAN CONT #1, OXY SEN, DFI MDL and ENG DEVICES Fuses
G100, G111, G113 and G151
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
Fuel Controls
Power, Grounds, MIL and Serial Data
OBD II Symbol Description Notice
Figure 3:

Fuel Controls


Object Number: 488641  Size: FS
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G302
G203 (3 of 3)
Handling ESD Sensitive Parts Notice
G203 (2 of 3)
Engine Controls Components
Powertrain Control Module Description
Fuel Injectors
Ignition System, Knock Sensor
OBD II Symbol Description Notice
Figure 4:

Fuel Injectors


Object Number: 488646  Size: FS
FUEL INJ, TRANS SOL and A/C RLY (COIL) Fuses
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
Engine Data Sensors - A/C Refrig Press, TP, MAP, ECT, IAT
Fuel Controls
OBD II Symbol Description Notice
Figure 5:

Engine Data Sensors -- A/C Refrig Press, TP, MAP, ECT, IAT


Object Number: 488651  Size: FS
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
Engine Data Sensors - HO2S 1, HO2S 2
Fuel Injectors
OBD II Symbol Description Notice
Figure 6:

Engine Data Sensors -- HO2S 1, HO2S 2


Object Number: 488655  Size: FS
FAN CONT #2 & #3, FAN CONT #1, OXY SEN, DFI MDL and ENG DEVICES Fuses
G100, G111, G113 and G151
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
Engine Data Sensors - MAF, EVAP Purge, Air Injection
Engine Data Sensors - A/C Refrig Press, TP, MAP, ECT, IAT
OBD II Symbol Description Notice
Figure 7:

Engine Data Sensors -- MAF, EVAP Purge, Air Injection


Object Number: 488659  Size: FS
FAN CONT #2 & #3, FAN CONT #1, OXY SEN, DFI MDL and ENG DEVICES Fuses
G113 - Continued
Handling ESD Sensitive Parts Notice
G101 (1 of 2)
Engine Controls Components
Powertrain Control Module Description
IAC, Engine Oil Level, Engine Oil Pressure, EGR, EVAP Vent
Engine Data Sensors - HO2S 1, HO2S 2
OBD II Symbol Description Notice
Figure 8:

IAC, Engine Oil Level, Engine Oil Pressure, EGR, EVAP Vent


Object Number: 488668  Size: FS
ABS/PCM, STOP, TURN SIGNAL and SRS Fuses
G113 - Continued
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
VSS, Cruise
Engine Data Sensors - MAF, EVAP Purge, Air Injection
OBD II Symbol Description Notice
Figure 9:

VSS, Cruise


Object Number: 488674  Size: FS
Handling ESD Sensitive Parts Notice
Power, Grounds and RAP Relay
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
EBCM, Generator, PCM, Tachometer
IAC, Engine Oil Level, Engine Oil Pressure, EGR, EVAP Vent
OBD II Symbol Description Notice
Figure 10:

EBCM, Generator, PCM, Tachometer


Object Number: 488676  Size: FS
EXT LTS, A/C RLY (CMPR) and PCM Fuses
Power, DLC, BCM, PCM, SP205, G203
PCM BCM/CLSTR, PWR MIR, CLSTR/BCM Fuses, RETAINED ACCSRY PWR CIRCUIT Breaker, HEADLAMP and RETAINED ACCSRY PWR Relays
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G203 (2 of 3)
Engine Controls Components
Powertrain Control Module Description
Automatic Transaxle Position Encoder, Crank Relay
VSS, Cruise
OBD II Symbol Description Notice
Figure 11:

Automatic Transaxle Position Encoder, Crank Relay


Object Number: 488678  Size: FS
ABS/PCM, STOP, TURN SIGNAL and SRS Fuses
ABS/PCM, STOP, TURN SIGNAL and SRS Fuses
G113 - Continued
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
Automatic Transaxle, TCC Switch
EBCM, Generator, PCM, Tachometer
OBD II Symbol Description Notice
Figure 12:

Automatic Transaxle, TCC Switch


Object Number: 488683  Size: FS
ABS/PCM, STOP, TURN SIGNAL and SRS Fuses
FUEL INJ, TRANS SOL and A/C RLY (COIL) Fuses
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
Automatic Transaxle, ISS, PC Solenoid, TFP
Automatic Transaxle Position Encoder, Crank Relay
OBD II Symbol Description Notice
Figure 13:

Automatic Transaxle, ISS, PC Solenoid, TFP


Object Number: 488685  Size: FS
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
A/C Compressor Controls
Automatic Transaxle, TCC Switch
OBD II Symbol Description Notice
Figure 14:

A/C Compressor Controls


Object Number: 488725  Size: FS
FUEL INJ, TRANS SOL and A/C RLY (COIL) Fuses
Handling ESD Sensitive Parts Notice
EXT LTS, A/C RLY (CMPR) and PCM Fuses
G100, G111, G113 and G151
Engine Controls Components
Powertrain Control Module Description
Coolant Fans
Automatic Transaxle, ISS, PC Solenoid, TFP
OBD II Symbol Description Notice
Figure 15:

Coolant Fans


Object Number: 488728  Size: FS
G101 (1 of 2)
Handling ESD Sensitive Parts Notice
Engine Controls Components
Powertrain Control Module Description
A/C Compressor Controls
OBD II Symbol Description Notice