GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Amplifier

Behind RH I/P on Evaporator

HVAC Component Views

in HVAC System Manual

HVAC Connector End Views

in HVAC System Manual

Clutch Pedal Position (CPP) Switch (Manual Transmission)

Behind LH I/P, above Powertrain Control Module (PCM)

Cruise Control Component Views

--

Crankshaft Position Sensor

Lower front of Engine, front of Oil Pan

--

--

Cruise Control Actuator

RH Engine Compartment, near Strut Tower

Cruise Control Component Views

in Cruise Control

--

Data Link Connector - On Board Diagnostics II (DLC-OBD II)

LH I/P, Left of Center Console on Knee Bolster

Data Link Communications Component Views

Data Link Communications Component Views

Distributor

Top rear of Engine

Engine Controls Component Views

Powertrain Control Module Connector End Views

Duty Check Data Link Connector (DLC) 1

RH Engine Compartment, behind RH Headlamp

Data Link Communications Component Views

--

Duty Check Data Link Connector (DLC) 2 (4-Speed Automatic Transmission)

RH Engine Compartment, behind RH Headlamp

Data Link Communications Component Views

Engine Coolant Temperature (ECT) Sensor

RH side of Engine in Thermostat Housing

Engine Controls Component Views

--

Evaporative (EVAP) Canister Purge Valve

RH front Engine, on Intake Manifold

Engine Controls Component Views

--

Evaporative (EVAP) Canister Vent Control Valve

RH Engine Compartment, near Fuse Block 1

--

--

Evaporative (EVAP) Tank Pressure Control Solenoid Vacuum Valve

RH Engine Compartment, near Fuse Block 1

--

--

Exhaust Gas Recirculation (EGR) Solenoid Vacuum Valve

RH front Engine, on Intake Manifold

Engine Controls Component Views

--

Four Wheel Drive Switch

Top of Transfer Case

Antilock Brake System Component Views

in ABS

--

Fuel Injector #1

Top RH side of Engine

Engine Controls Component Views

--

Fuel Injector #2

Top RH side of Engine

Engine Controls Component Views

--

Fuel Injector #3

Top RH side of Engine

Engine Controls Component Views

--

Fuel Injector #4

Top RH side of Engine

Engine Controls Component Views

--

Fuel Level Sensor

In Fuel Tank

Engine Controls Component Views

--

Fuel Pump

In Fuel Tank

Engine Controls Component Views

--

Fuel Pump Relay

Center I/P, behind Blower Speed Selector Switch

Engine Controls Component Views

Fuel Tank Pressure Sensor

In Fuel Tank

Engine Controls Component Views

--

Fuse Block 1

RH Engine Compartment, front of Battery

Power and Grounding Component Views

--

Fuse Block 1 - C1 (3 Cavities)

Main Harness to Fuse Block 1, below Fuse Block 1

Power and Grounding Component Views

--

Fuse Block 2

Under LH I/P

Power and Grounding Component Views

--

Generator

RH Lower front of Engine

--

--

Heated Oxygen Sensor 1 (HO2S1)

LH rear of Engine, in Exhaust Manifold

Engine Controls Component Views

--

Heated Oxygen Sensor 2 (HO2S2)

Below Vehicle after Three-Way Catalytic Converter (TWC)

Engine Controls Component Views

--

Idle Air Control (IAC) Valve

RH Engine, below Throttle Body

--

--

Ignition Switch

On Steering Column

Power and Grounding Component Views

--

Instrument Panel Cluster Assembly

LH I/P

--

--

Instrument Panel Cluster Assembly C1 (16 Terminals)

I/P Harness to I/P Cluster Assembly, behind I/P Cluster Assembly

Instrument Panel, Gages, and Console Component Views

in Instrument Panel,Gages and Consol

--

Instrument Panel Cluster Assembly C3 (13 Terminals)

I/P Harness to I/P Cluster Assembly, behind I/P Cluster Assembly

Instrument Panel, Gages, and Console Component Views

in Instrument Panel,Gages and Consol

--

Intake Air Temperature (IAT) Sensor

RH front Engine below Throttle Body

Engine Controls Component Views

--

Main Relay

Center I/P, behind Blower Speed Selector Switch

Engine Controls Component Views

Manifold Absolute Pressure (MAP) Sensor

Rear Engine Compartment, on Bulkhead

Engine Controls Component Views

--

Mass Air Flow (MAF) Sensor

LH Front Engine compartment, on Air Cleaner (ACL) Housing

Engine Controls Component Views

--

Noise Suppressor Filter

LH Front Engine Compartment, below Front Wiper Motor

Engine Controls Component Views

Oil Pressure Switch

LH Engine, above Oil Filter

Instrument Panel, Gages, and Console Component Views

in Instrument Panel,Gages and Consol

--

Overdrive Switch (4-Speed Automatic Transmission)

Center Console, mounted in Manual Selector Lever

--

--

Park/Neutral Position (PNP) Switch (3-Speed Automatic transmission)

RH side of Transmission

--

--

Park/Neutral Position (PNP) Switch (3-Speed Automatic transmission) - C1 (2 Cavities)

Engine Harness to PNP Switch, RH side of Transmission

--

--

Powertrain Control Module (PCM)

Under LH I/P, left of Steering Column

Engine Controls Component Views

--

Powertrain Control Module (PCM) - (3 Speed Automatic and Manual Transmissions) - C1 (22 Cavities)

Main Harness to PCM, behind I/P left of Steering Column

Engine Controls Component Views

--

Powertrain Control Module (PCM) - (3 Speed Automatic and Manual Transmissions) - C2 (16 Cavities)

Main Harness to PCM, behind I/P left of Steering Column

Engine Controls Component Views

--

Powertrain Control Module (PCM) - (3 Speed Automatic and Manual Transmissions) - C3 (26 Cavities)

Main Harness to PCM, behind I/P left of Steering Column

Engine Controls Component Views

--

Powertrain Control Module (PCM) - (4-Speed Automatic Transmission) - C1 (22 Cavities)

Main Harness to PCM, behind I/P left of Steering Column

Engine Controls Component Views

--

Powertrain Control Module (PCM) - (4-Speed Automatic Transmission) - C2 (12 Cavities)

Main Harness to PCM, behind I/P left of Steering Column

Engine Controls Component Views

--

Powertrain Control Module (PCM) - (4-Speed Automatic Transmission) - C3 (16 Cavities)

Main Harness to PCM, behind I/P left of Steering Column

Engine Controls Component Views

--

Powertrain Control Module (PCM) - (4-Speed Automatic Transmission) - C4 (26 Cavities)

Main Harness to PCM, behind I/P left of Steering Column

Engine Controls Component Views

--

Power/Normal Switch (4-Speed Automatic Transmission)

In Center Console, right of Manual Selector Lever

--

--

Power Steering Pressure Switch

Lower LH Engine, in Power Steering Pump

Engine Controls Component Views

--

Shift Solenoid No. 1 (4-Speed Automatic Transmission)

In Transmission, attached to Valve Body

--

--

Shift Solenoid No. 2 (4-Speed Automatic Transmission)

In Transmission, attached to Valve Body

--

--

Starter Motor

Lower RH side of Engine, under Intake Manifold

--

--

Stoplamp Switch

Under LH I/P, above Brake Pedal

Lighting Systems Component Views

in Lighting Systems

--

Throttle Position (TP) Sensor

On Throttle Body

Engine Controls Component Views

Powertrain Control Module Connector End Views

Torque Converter Clutch (TCC) Relay (3-Speed Automatic Transmission)

RH Engine Compartment, in front of Battery

--

--

Torque Converter Clutch (TCC) Solenoid (Automatic Transmission)

In Transmission, attached to Valve Body

--

--

Transmission Range Switch (4-Speed Automatic Transmission)

RH side of Transmission

--

--

Vehicle Speed Sensor (VSS) (4-Speed Automatic Transmission)

LH side of Transmission, in Adapter Case

--

--

C100 (16 cavities)

Main Harness to Engine Harness, mounted to Bracket on Bulkhead, left of Front Wiper Motor

Harness Routing Views

--

C101 (16 Cavities)

Main Harness to Engine Harness, mounted to Bracket on Bulkhead, left of Front Wiper Motor

Harness Routing Views

--

C102 (6 Cavities) (3-Speed Automatic Transmission)

Main Harness to Engine Harness, mounted to Bracket on Bulkhead, left of Front Wiper Motor

Harness Routing Views

--

C102 (4 Cavities) (Manual and 4-Speed Automatic Transmissions)

Main Harness to Engine Harness, mounted to Bracket on Bulkhead, left of Front Wiper Motor

Harness Routing Views

--

C103 (12 Cavities) (Manual and 4-Speed Transmissions)

Main Harness to Engine Harness, mounted to Bracket on Bulkhead, left of Front Wiper Motor

Harness Routing Views

--

C104 (6 Cavities) (Manual and 3-Speed Automatic Transmissions)

Engine Harness to Transmission Harness, under Intake Manifold

Harness Routing Views

--

C104 (9 Cavities) (4-Speed Automatic Transmission)

Engine Harness to Transmission Harness, under Intake Manifold

Harness Routing Views

--

C105 (12 Cavities)

Engine Harness to Injector Harness, RH front of Engine

Harness Routing Views

--

C106 (10 Cavities) (4-Speed Automatic Transmission)

Engine Harness to Transmission Harness, RH rear Engine, under Intake Manifold

Harness Routing Views

--

C200 (22 Cavities)

Main Harness to I/P Harness, LH I/P near Fuse Block 2

Harness Routing Views

--

C201 (16 Cavities)

Main Harness to I/P Harness, LH I/P near fuse Block 2

Harness Routing Views

--

C202 (22 Cavities)

Main Harness to Floor harness, LH I/P near G200

Harness Routing Views

--

C211 (16 Cavities)

I/P Harness to Floor Harness, LH I/P, near A-Pillar

Harness Routing Views

--

C212 (10 Cavities)

Main Harness to A/C Amplifier Jumper Harness, RH I/P, behind I/P Compartment

Harness Routing Views

--

C213 (6 Cavities)

I/P Harness to Shift Illumination Jumper Harness, Center I/P

Harness Routing Views

--

C302 (6 Cavities)

Floor Harness to Sub-Floor Harness, behind LH Rear Passenger Compartment Trim Panel

Harness Routing Views

--

C400 (12 Cavities)

Floor Harness to Rear Lamp Harness, behind LH Rear Wheelhousing

Harness Routing Views

--

C401 (6 Cavities) (2-Door)

Floor Harness to Rear Lamp Harness, behind LH Rear Wheelhousing

Harness Routing Views

--

C401 (10 Cavities) (4-Door)

Floor Harness to Rear Lamp Harness, behind LH Rear Wheelhousing

Harness Routing Views

--

C411 (3 Cavities) (4-Door)

Rear Lamp Harness to Fuel Pressure Sensor Jumper Harness, under rear of Vehicle above Fuel Tank

Harness Routing Views

--

G101

On Bulkhead behind Distributor

Power and Grounding Component Views

--

G102

RH Rear of Engine near Distributor

Power and Grounding Component Views

--

G103

RH Rear Engine Compartment mounted to Intake Manifold

Power and Grounding Component Views

--

G200

Behind LH I/P, above Fuse Block 2

Power and Grounding Component Views

--

G201

Behind RH I/P, near Blower Assembly

Power and Grounding Component Views

--

G202

Behind Center I/P on Bulkhead

Power and Grounding Component Views

--

G300 (4-Door)

LH Rear Passenger Compartment, behind Trim Panel

Power and Grounding Component Views

--

G300 (2-Door)

LH Rear Passenger Compartment, behind Trim Panel

Power and Grounding Component Views

--

G400

Inside Rear Door near License Plate Lamps

Power and Grounding Component Views

--

G402 (2-Door)

Rear Lamp Harness, behind LH Rear Wheelhousing

Power and Grounding Component Views

--

P200

LH Rear Engine Compartment on Bulkhead, near Brake Master Cylinder

Harness Routing Views

--

P201

RH Rear Engine Compartment on Bulkhead, near Battery

Harness Routing Views

--

P300 (2-Door)

LH A-Pillar, under I/P, behind LH Kick Panel

Harness Routing Views

--

P401

Rear of Vehicle, right of LH Frame Rail

Harness Routing Views

--

S106

Main Harness, approximately 10 cm from Noise Suppressor Filter connector breakout

Harness Routing Views

--

S107

Engine Harness, Approximately 10 cm from C104 breakout

Harness Routing Views

--

S108 (4-Speed Automatic transmission)

Transmission Harness, near 4WD Switch breakout

Harness Routing Views

--

S112

Main Harness, Approximately 2 cm from P200

Harness Routing Views

--

S122

Engine Harness, approximately 4 cm from Crankshaft Position Sensor connector breakout

Harness Routing Views

--

S125

Engine harness, approximately 4 cm from Starter Motor connector breakout

Harness Routing Views

--

S128

Injector Harness, near C105 breakout

Harness Routing Views

--

S129

Injector Harness, near Idle Air Control (IAC) Valve connector breakout

Harness Routing Views

--

S130

Main Harness, approximately 20 cm from Noise Suppressor Filter connector breakout

Harness Routing Views

--

S131

Main Harness, approximately 19 cm from P201

Harness Routing Views

--

S132

Main Harness, approximately 7 cm from Noise Suppressor Filter connector breakout

Harness Routing Views

--

S133

Main Harness, near Heated Oxygen Sensor 1 (HO2S1) connector breakout

Harness Routing Views

--

S139

Main Harness, approximately 10 cm from Noise Suppressor Filter connector breakout

Harness Routing Views

--

S140

Main Harness, approximately 6 cm from Noise Suppressor Filter connector breakout

Harness Routing Views

--

S141

Main Harness, approximately 11 cm from P200

Harness Routing Views

--

S142 (3-Speed Automatic Transmission)

Main Harness, approximately 8 cm from P200

Harness Routing Views

--

S204

I/P Harness, approximately at C211 breakout

Harness Routing Views

--

S208

Main Harness, approximately 18 cm from Ignition Switch connector breakout

Harness Routing Views

--

S210

Main Harness, approximately 12 cm from Stoplamp Switch connector breakout

Harness Routing Views

--

S215

Main Harness, near Powertrain Control Module (PCM) connector C2 breakout

Harness Routing Views

--

S216

Main Harness, approximately 2 cm from Stoplamp Switch connector breakout

Harness Routing Views

--

S218

Main harness, near G200 breakout

Harness Routing Views

--

S219

Main Harness, approximately 10 cm from Daytime Running Lamps (DRL) Control Module connector breakout

Harness Routing Views

--

S220

Main Harness, approximately 1 cm from Blower Speed Selector switch connector breakout

Harness Routing Views

--

S222

Main Harness, approximately 10 cm from Blower Speed Selector Switch connector breakout

Harness Routing Views

--

S223

Main Harness, near Fuse Block 2

Harness Routing Views

--

S226

I/P Harness, approximately at Radio breakout

Harness Routing Views

--

S227

Main Harness, approximately 8 cm from Stoplamp Switch connector breakout

Harness Routing Views

--

S230

Main Harness, approximately 5 cm from G300 breakout

Harness Routing Views

--

S234 (4-Speed Automatic Transmission)

In Manual Selector Lever Harness

Harness Routing Views

--

S241

Main Harness, approximately 2 cm from Powertrain Control Module (PCM) connector breakout

Harness Routing Views

--

S248 (Manual Transmission)

Main Harness, approximately 13 cm from steering column branch breakout

Harness Routing Views

--

S251

Main Harness, approximately 5 cm from Stoplamp Switch connector breakout

Harness Routing Views

--

S254

Main Harness, approximately 10 cm from G200 breakout

Harness Routing Views

--

S260

Main Harness, approximately 4 cm from Stoplamp Switch connector breakout

Harness Routing Views

--

S262

Main Harness, approximately 8 cm from Stoplamp Switch connector breakout

Harness Routing Views

--

S264

Main Harness, approximately 18 cm from Blower Speed Selector Switch connector breakout

Harness Routing Views

--

S272

Main Harness, approximately 11 cm from G200 breakout

Harness Routing Views

--

S275

Main Harness, approximately 11 cm from Ignition Switch connector breakout

Harness Routing Views

--

S276

Main Harness, approximately 1 cm from G200 breakout

Harness Routing Views

--

S285

Main Harness, approximately 10 cm from Daytime Running Lamps (DRL) Contol Module connector breakout

Harness Routing Views

--

S286

Main Harness, approximately 6 cm from C216 breakout

Harness Routing Views

--

S287

Main Harness, approximately 4 cm from C203 breakout

Harness Routing Views

--

S288

Main Harness, approximately 2 cm from G200 breakout

Harness Routing Views

--

S294

Main Harness, approximately 10 cm from G200 breakout

Harness Routing Views

--

S295

Main Harness, approximately 7 cm from Blower Speed Selector Switch connector breakout

Harness Routing Views

--

S296

Main Harness, approximately 6 cm from Stoplamp Switch connector breakout

Harness Routing Views

--

S297

Main Harness, approximately 5 cm from DRL Diode connector breakout

Harness Routing Views

--

S298

Main Harness, approximately 2 cm from G200 breakout

Harness Routing Views

--

S299

Main Harness, approximately 6 cm from P201

Harness Routing Views

--

S401

Rear Lamp Harness, near LH Rear Combination Lamp

Harness Routing Views

--

S402

Rear Lamp Harness, near RH Rear Combination Lamp

Harness Routing Views

--

S403

Rear Lamp Harness, near RH Rear Combination Lamp

Harness Routing Views

--

S404 (2-Door)

Floor Harness, approximately 4 cm from C406 breakout

Harness Routing Views

--

S404 (4-Door)

Floor Harness, approximately 30 cm from LH Rear Speaker connector breakout

Harness Routing Views

--

S405

Rear Door Harness, approximately 4 cm from G300

Harness Routing Views

--

S419 (4-Door)

Floor Harness, approximately 50 cm from G300

Harness Routing Views

--