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

Main Relay, Powertrain Control Module (PCM) Power and Ground


Object Number: 883455  Size: FS
Master Electrical Component List
Data Link Connector (DLC) and Malfunction Indicator Lamp (MIL)
OBD II Symbol Description Notice
BATT, ABS, FI and ACC Fuses
HAZ, D/L, TAIL, STOP and DOME Fuses
HAZ, D/L, TAIL, STOP and DOME Fuses
HAZ, D/L, TAIL, STOP and DOME Fuses
IG Fuse, S205 and S101
G100, G101 and G102
Figure 2:

Data Link Connector (DLC) and Malfunction Indicator Lamp (MIL)


Object Number: 883456  Size: FS
Master Electrical Component List
Exhaust Gas Recirculation (EGR) Valve and EVAP Solenoids
Main Relay, Powertrain Control Module (PCM) Power and Ground
OBD II Symbol Description Notice
SP200 and G200
S248
SIR Schematics
HAZ, D/L, TAIL, STOP and DOME Fuses
HAZ, D/L, TAIL, STOP and DOME Fuses
IG Fuse, S205 and S101
TURN and WIP Fuses
Power, O/D OFF, 4WD, MIL, CRUISE, Charge Indicators
Figure 3:

Exhaust Gas Recirculation (EGR) Valve and EVAP Solenoids


Object Number: 883457  Size: FS
Master Electrical Component List
Idle Air Control (IAC) Valve, Mass Air Flow (MAF) Sensor, Vehicle Speed Sensor
Data Link Connector (DLC) and Malfunction Indicator Lamp (MIL)
OBD II Symbol Description Notice
BATT, ABS, FI and ACC Fuses
Figure 4:

Idle Air Control (IAC) Valve, Mass Air Flow (MAF) Sensor, Vehicle Speed Sensor (VSS)


Object Number: 883458  Size: FS
Master Electrical Component List
Ignition System
Exhaust Gas Recirculation (EGR) Valve and EVAP Solenoids
OBD II Symbol Description Notice
BATT, ABS, FI and ACC Fuses
Cruise Control Servo, Vehicle Speed Sensor (VSS)
G103
Figure 5:

Ignition System


Object Number: 883460  Size: FS
Master Electrical Component List
Fuel Injectors
Idle Air Control (IAC) Valve, Mass Air Flow (MAF) Sensor, Vehicle Speed Sensor
OBD II Symbol Description Notice
IG Fuse, S205 and S101
Radio Schematic
IG Fuse, S205 and S101
G103
Figure 6:

Fuel Injectors


Object Number: 883461  Size: FS
Master Electrical Component List
ECT, IAT, MAP, TPS and FTP Sensors
Ignition System
OBD II Symbol Description Notice
BATT, ABS, FI and ACC Fuses
Figure 7:

ECT, IAT, MAP, TP and FTP Sensors


Object Number: 883463  Size: FS
Master Electrical Component List
Fuel Pump Relay and Fuel Sender Assembly
Fuel Injectors
OBD II Symbol Description Notice
Figure 8:

Fuel Pump Relay and Fuel Sender Assembly


Object Number: 883465  Size: FS
Master Electrical Component List
Crankshaft Position (CKP), Camshaft Position (CMP) and Knock (KS) Sensors
ECT, IAT, MAP, TPS and FTP Sensors
OBD II Symbol Description Notice
BATT, ABS, FI and ACC Fuses
IG Fuse, S205 and S101
IG Fuse, S205 and S101
G400 and G401
G103
Figure 9:

Crankshaft Position (CKP), Camshaft Position (CMP) and Knock Sensors (KS)


Object Number: 883466  Size: FS
Master Electrical Component List
Heated Oxygen Sensors (HO2S)
Fuel Pump Relay and Fuel Sender Assembly
OBD II Symbol Description Notice
BATT, ABS, FI and ACC Fuses
IG Fuse, S205 and S101
TURN and WIP Fuses
Oil Pressure Indicator, Fuel, ECT Gauges, Tachometer
G100, G101 and G102
Figure 10:

Heated Oxygen Sensors (HO2S)


Object Number: 1309671  Size: FS
Master Electrical Component List
Transmission Range Switch, Clutch Pedal Position switch
Crankshaft Position (CKP), Camshaft Position (CMP) and Knock (KS) Sensors
OBD II Symbol Description Notice
IG Fuse, S205 and S101
IG Fuse, S205 and S101
G100, G101 and G102
Figure 11:

Transmission Range Switch, Clutch Pedal Position Switch


Object Number: 883469  Size: FS
Master Electrical Component List
Four Wheel Drive Switches and Front Drive Axle Actuator Pump
Heated Oxygen Sensors (HO2S)
OBD II Symbol Description Notice
Figure 12:

Four Wheel Drive Switches and Front Drive Axle Actuator Pump


Object Number: 883470  Size: FS
Master Electrical Component List
Stoplamp Switch and Transmission Range Switch
Transmission Range Switch, Clutch Pedal Position switch
OBD II Symbol Description Notice
SP201 and G201
SP201 and G201
G105
Power, O/D OFF, 4WD, MIL, CRUISE, Charge Indicators
TURN and WIP Fuses
TURN and WIP Fuses
Figure 13:

Stoplamp Switch and Transmission Range Switch


Object Number: 883472  Size: FS
Master Electrical Component List
Input and Output Shaft Speed Sensors
Four Wheel Drive Switches and Front Drive Axle Actuator Pump
OBD II Symbol Description Notice
HAZ, D/L, TAIL, STOP and DOME Fuses
TURN and WIP Fuses
HAZ, D/L, TAIL, STOP and DOME Fuses
Stoplamps
Backup Lamps
TURN and WIP Fuses
Figure 14:

Input and Output Shaft Speed Sensors, Torque Converter Clutch (TCC) Solenoid


Object Number: 883473  Size: FS
Master Electrical Component List
Overdrive Switch and Shift Program Switch
Stoplamp Switch and Transmission Range Switch
OBD II Symbol Description Notice
Figure 15:

Overdrive Switch and Shift Program Switch


Object Number: 883475  Size: FS
Master Electrical Component List
Powertrain Control Module (PCM) Idle-Up Inputs
Input and Output Shaft Speed Sensors
OBD II Symbol Description Notice
Instrument Panel Lamp Dimmer Control
SP201 and G201
SP201 and G201
TURN and WIP Fuses
TURN and WIP Fuses
Power, O/D OFF, 4WD, MIL, CRUISE, Charge Indicators
Figure 16:

Powertrain Control Module (PCM) Idle-Up Inputs


Object Number: 883476  Size: FS
Master Electrical Component List
Overdrive Switch and Shift Program Switch
OBD II Symbol Description Notice
Defogger Schematics
Side Marker Lamps, Light Switch, Ambient Light Sensor
Blower Control with A/C