GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Pressure Sensor

Right lower front corner of the engine, near the A/C compressor on the hose assembly

HVAC Component Views in HVAC System - Automatic

HVAC Connector End Views in HVAC System - Automatic

ABS/TCC Switch

Under the left side of the instrument panel, near the top of the brake pedal

Engine Controls Component Views

Engine Controls Connector End Views

Camshaft Position (CMP) Sensor

Right rear corner of the engine, in the cam carrier, near the power steering pump

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor A

Center front of the engine, near the base of the engine oil level switch

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor B

Center front of the engine, near the base of the engine oil level switch

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Module

Center rear of the engine compartment, near the power brake booster

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Under left side of the instrument panel near the steering column

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Electronic Brake Control Module (EBCM)

Front left lower corner of the engine compartment, under the air cleaner housing

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Electronic Suspension Control Module

Right hand rear of the passenger compartment, behind the rear seat back

Suspension Controls Component Views in Road Sensing Suspension - RSS

Suspension Controls Connector End Views in Road Sensing Suspension - RSS

Engine Coolant Temperature (ECT) Sensor

Left rear corner of the engine, below the exhaust gas recirculation (EGR) valve, near G103

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Level Switch

Bottom front of the engine, near the A/C compressor

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

Engine Oil Pressure Switch

Center front of the engine, near the engine oil filler adapter

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

Evaporative Emissions (EVAP) Canister Purge Valve

Left rear of the engine, on the cam cover

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Vent Valve

Beneath the rear compartment, on the left side of the vehicle

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

Left rear of the engine, on the cam cover

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injectors

Center top of the engine, under the intake manifold top cover

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Sender

Under the center rear of the vehicle, in the fuel tank

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Pressure Sensor

Under the center of the vehicle, on top of the fuel tank

Engine Controls Component Views

Engine Controls Connector End Views

Generator

Right front corner of the engine, near the underhood fuse block

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

Center rear of the engine compartment, on the rear exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

Under center of the vehicle, near the catalytic converter rear flange

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Center front of the engine compartment, on the front exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Idle Air Control (IAC) Valve

Left side of the engine, in the front of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Coil Assembly - Front Bank

Under the intake manifold top cover, on the front of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Coil Assembly - Rear Bank

Under the intake manifold top cover, on the rear of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control (IC) Module - Front Bank

Left front corner of the engine, under the intake manifold top cover

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control (IC) Module - Rear Bank

Right front corner of the engine, under the intake manifold top cover

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Switch

Right side of the steering column

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Instrument Cluster

Left side of the instrument panel, above the steering column

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

Knock Sensor (KS)

Center top of the engine, under the intake manifold top cover

Engine Controls Component Views

Engine Controls Connector End Views

LH Engine Cooling Fan Motor

Left front of the engine compartment, behind the radiator

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Manifold Absolute Pressure (MAP) Sensor

Top left side of the engine, right of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow and Intake Air Temperature (MAF/IAT) Sensor

Top left side of the engine, on the front of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Navigation Data Processor

Left rear of the passenger compartment, behind the rear seat back

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

Powertrain Control Module (PCM)

Front left side of the engine compartment, below the air cleaner

Engine Controls Component Views

Powertrain Control Module Connector End Views

Rear Fuse Block

Left rear of the passenger compartment, under the rear seat

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Rear Object Sensor Control Module

Right side of the rear compartment

Rear Parking Assist Component Views in Instrument Panel, Gauges and Console

Rear Parking Assist Connector End Views in Instrument Panel, Gauges and Console

RH Engine Cooling Fan Motor

Right front of the engine compartment, behind the radiator

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Secondary Air Injection (AIR) Pump Motor 1 (w/NB6)

Lower right front corner of the engine compartment

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection (AIR) Pump Motor 2 (w/NB6)

Lower right front corner of the engine compartment

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection (AIR) Pump Relay 1 (w/NB6)

Right rear corner of the engine compartment, near the radiator surge tank

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection (AIR) Pump Relay 2 (w/NB6)

Right rear corner of the engine compartment, near the radiator surge tank

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection (AIR) Solenoid Valve (w/NB6)

Center rear of the engine compartment, on the rear exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Throttle Position (TP) Sensor

Top left side of the engine, on the front of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Underhood Fuse Block

Right side of the engine compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Speed Sensor (VSS)

Right center of the engine compartment, on the transaxle case extension

Engine Controls Component Views

Engine Controls Connector End Views

C100 (20 cavities)

Transaxle harness to the engine harness, left of the engine compartment near the thermostat housing

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101 (40 cavities)

Engine harness to the body harness, left rear of the engine compartment near the master cylinder

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C107 (3 cavities)

Starter harness to the engine harness, right rear corner of the engine near the rear cam cover

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C115 (10 cavities)

Transaxle harness to the transaxle valve harness, left side of the engine compartment in the transaxle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (40 cavities)

Instrument panel harness to the body harness, under the left side of the instrument panel near the park brake pedal

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C201 (40 cavities)

Instrument panel harness to the body harness, under the right side of the instrument panel near the rear of the instrument panel compartment

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C202 (40 cavities)

Body harness to the steering column harness, under the left side of the instrument panel near the base of the steering column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C420 (7 cavities)

Fuel tank harness to the body harness, under the right rear of the vehicle, near the wheelhouse

--

Inline Harness Connector End Views in Wiring Systems

G100

Lower left front corner of the engine, below the thermostat housing

Power and Grounding Component Views in Wiring Systems

--

G101

Left front of the engine compartment, on the left side of the radiator support

Power and Grounding Component Views in Wiring Systems

--

G102 (w/NB6)

Lower left front corner of the engine, below the thermostat housing

Power and Grounding Component Views in Wiring Systems

--

G103

Right rear of the engine, below the exhaust gas recirculation valve

Power and Grounding Component Views in Wiring Systems

--

G104

Right front of the engine compartment, near the windshield washer fluid reservoir filler neck

Power and Grounding Component Views in Wiring Systems

--

G200

Left front corner of the passenger compartment, under the front of the sill trim plate

Power and Grounding Component Views in Wiring Systems

--

G201

Right front corner of the passenger compartment, under the front of the sill trim plate

Power and Grounding Component Views in Wiring Systems

--

G301

Under the left front corner of the rear seat

Power and Grounding Component Views in Wiring Systems

 

G402

Left rear corner of the rear compartment, near the left tail lamp connector

Harness Routing Views in Wiring Systems

--

P100

Right lower corner of the engine compartment, near the base of the strut tower

Harness Routing Views in Wiring Systems

--

P101

Left lower corner of the engine compartment, near the base of the strut tower

Harness Routing Views in Wiring Systems

--

P400

Left side of the rear compartment, near the wheelhouse

Harness Routing Views in Wiring Systems

--

P401

Right side of the rear compartment, near the wheelhouse

Harness Routing Views in Wiring Systems

--

S113

In the transaxle harness, approximately 33.5 cm (13.2 in) from C115

Harness Routing Views in Wiring Systems

--

S200

In the instrument panel harness, approximately 18.5 cm (7.3 in) from instrument cluster connector

Harness Routing Views in Wiring Systems

--

S206

In the instrument panel harness, approximately 72.1 cm (28.4 in) from the radio connector

Harness Routing Views in Wiring Systems

--

S209

In the instrument panel harness, approximately 31.5 cm (12.4 in) from C204

Harness Routing Views in Wiring Systems

--

S210

In the body harness, approximately 67.1 cm (26.4 in) from C200

Harness Routing Views in Wiring Systems

--

S213

In the body harness, approximately 73.2 cm (28.8 in) from C200

Harness Routing Views in Wiring Systems

--

S220

In the steering column harness

Harness Routing Views in Wiring Systems

--

S405

In the body harness, approximately 15 cm (5.9 in) from P401

Harness Routing Views in Wiring Systems

--