GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch

On the right front side of the engine, on the A/C compressor

--

Component Connector End Views

A/C Low Pressure Switch

In the right front of the engine compartment, on the A/C receiver/drier assembly

--

Component Connector End Views

A/C Switch (C60)

In the center of the instrument panel, in the HVAC control assembly

Instrument Panel/Center Console Component Views

Component Connector End Views

Automatic Transaxle (A/T)

--

--

Component Connector End Views

Automatic Transmission Shift Lever Position Indicator (MFL)

--

--

Component Connector End Views

Backup Lamp - Left (XCE/RHD with T98)

On the left rear of the vehicle, above the rear bumper

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Backup Lamp - Right (LHD/RHD without T98)

On the right rear of the vehicle, above the rear bumper

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Backup Lamp Switch (M/T)

In the left side of the engine compartment, on top of the transmission case

--

--

Backup Lamp Switch (M/T)

In the left side of the engine compartment, on top of the transmission case

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Battery

In the left side of the engine compartment

--

--

Battery Saver

Behind the driver side of I/P

--

Component Connector End Views

Blower Motor

Below the passenger side of the instrument panel, in the HVAC module

--

Component Connector End Views

Blower Motor Resistor

In the HVAC module, next to the blower motor

Instrument Panel/Center Console Component Views

Component Connector End Views

Blower Motor Switch

In the center of the instrument panel, in the HVAC control assembly

Instrument Panel/Center Console Component Views

Component Connector End Views

Brake Fluid Level Switch

In the left rear of the engine compartment, in the brake master cylinder reservoir

--

Component Connector End Views

Camshaft Position (CMP) Sensor

On the top left side of the cylinder head, near the EGR valve

Powertrain Component Views

Component Connector End Views

Center High Mounted Stop Lamp (CHMSL)

In the lower center of the rear window

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Cigar Lighter

In the lower center of the instrument panel, next to the ashtray

Instrument Panel/Center Console Component Views

--

Courtesy Lamp

In the front center of the headliner

Passenger Compartment/Roof Component Views

Component Connector End Views

Crankshaft Position (CKP) Sensor

On the lower front side of the engine block, near the transmission

Powertrain Component Views

Component Connector End Views

Data Link Connector (DLC)

Under the I/P compartment

--

--

Data Link Connector (DLC) 2

In the left rear side of the engine compartment, next to the brake fluid reservoir

--

Component Connector End Views

Daytime Running Lamp Relay (DTR)

Under the left side of the instrument panel above the gas pedal, on the side of the I/P fuse block

--

Component Connector End Views

Daytime Running Lights (DRL) Diode (DTR)

--

--

Component Connector End Views

Daytime Running Lights (DRL) Module (DTR)

Behind the left side of the instrument panel, near the I/P fuse block

Instrument Panel/Center Console Component Views

Component Connector End Views

Door Jamb Switch - Driver

On driver door

--

--

Door Jamb Switch - Left Rear

On left rear door

--

--

Door Jamb Switch - Passenger

On front passenger door

--

--

Door Jamb Switch - Right Rear

On right rear door

--

--

Door Lock Actuator - Driver

--

--

Component Connector End Views

Door Lock Actuator - Left Rear

--

--

Component Connector End Views

Door Lock Actuator - Passenger

--

--

Component Connector End Views

Door Lock Actuator - Right Rear

--

--

Component Connector End Views

Door Lock Relay

Below the passenger side of the instrument panel, below the HVAC module

Instrument Panel/Center Console Component Views

Component Connector End Views

Driver Information Center (DIC)

In the instrument panel, above the steering wheel

Instrument Panel/Center Console Component Views

Component Connector End Views

Electronic Brake Control Module (EBCM)

In the right rear side of the engine compartment, on the frame rail

Powertrain Component Views

Component Connector End Views

Engine Control Module (ECM)

In the left rear of the engine compartment

Powertrain Component Views

Component Connector End Views

Engine Coolant Temperature (ECT) Sensor

On the front of the engine, on the coolant outlet

Powertrain Component Views

Component Connector End Views

Engine Cooling Fan

On the left side of the radiator

--

Component Connector End Views

Engine Cooling Fan Resistor

On the left side of the radiator support in front of the engine fuse block

--

--

Engine Oil Pressure (EOP) Switch

On the rear side of the engine block

Powertrain Component Views

--

Evaporative Emission (EVAP) Canister Purge Solenoid Valve

In the right rear of the engine compartment, on the cowl panel near the MAP sensor

Powertrain Component Views

Component Connector End Views

Evaporator Temperature Sensor

In the HVAC module, on the evaporator

--

Component Connector End Views

Exhaust Gas Recirculation (EGR) Valve

On the left rear side of the cylinder head

Powertrain Component Views

Component Connector End Views

Fog Lamp - Left Front

In the bottom left of the front fascia

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Fog Lamp - Rear (T98)

On the left rear of the vehicle, above the rear bumper

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Fog Lamp - Right Front

In the bottom right of the front fascia

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Fog Lamp Switch - Rear (T98)

In the center of the instrument panel, above the HVAC controls

--

Component Connector End Views

Fuel Injector 1

In the rear of the engine compartment, on the fuel rail

Powertrain Component Views

Component Connector End Views

Fuel Injector 2

In the rear of the engine compartment, on the fuel rail

Powertrain Component Views

Component Connector End Views

Fuel Injector 3

In the rear of the engine compartment, on the fuel rail

Powertrain Component Views

Component Connector End Views

Fuel Injector 4 (1.0L)

In the rear of the engine compartment, on the fuel rail

Powertrain Component Views

Component Connector End Views

Fuel Level Sensor

--

--

--

Fuel Pump and Sender Assembly

Below the rear seat, in the fuel tank

Wheels/Vehicle Underbody Component Views

Component Connector End Views

Fuel Tank Pressure (FTP) Sensor (NQU)

Below the rear seat, in the fuel tank

--

--

Fuse Block - I/P

In the driver side of the instrument panel, above the kickpanel

--

--

Fuse Block - Underhood

In the left rear of the engine compartment, on the strut tower

Front of Vehicle/Engine Compartment Component Views

Electrical Center Identification Views

Generator

On the lower right rear of the engine

--

Component Connector End Views

Hazard Warning Switch

In the center of the instrument panel, above the radio

Instrument Panel/Center Console Component Views

Component Connector End Views

Headlamp - Left

On the left front of the vehicle

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Headlamp - Right

On the right front of the vehicle

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Headlamp Leveling Actuator - Left (TR6)

--

--

Component Connector End Views

Headlamp Leveling Actuator - Right (TR6)

--

--

Component Connector End Views

Headlamp Leveling Module (HL4)

In the driver side of the instrument panel, under the outboard vent

Instrument Panel/Center Console Component Views

Component Connector End Views

Headlamp Switch

--

--

Component Connector End Views

Heated Oxygen Sensor (HO2S) 1

In the exhaust manifold

Powertrain Component Views

Component Connector End Views

Heated Oxygen Sensor (HO2S) 2

In the exhaust pipe after the catalytic converter

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Heated Seat Element - Driver Cushion (C54)

Under the driver seat cushion

--

--

Heated Seat Switch - Driver (C54)

--

--

--

Hood Ajar Switch

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

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Horn

Behind the left side of the front fascia

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Horn Switch

On the steering wheel, under airbag module

--

--

HVAC Control Assembly Illumination Lamp (except C15)

--

--

Component Connector End Views

I/P Dimmer Switch (UF6)

In the driver side of the instrument panel, under the outboard vent

--

Component Connector End Views

Idle Air Control (IAC) Valve

On the rear of the engine, on the throttle body

Powertrain Component Views

Component Connector End Views

Ignition Coil

Engine compartment, top front of the engine

Powertrain Component Views

Component Connector End Views

Ignition Key Detection Coil

In the right side of the steering column, around the ignition key cylinder

Instrument Panel/Center Console Component Views

--

Ignition Switch

On the right side of the steering column

--

--

Immobilizer Control Module (EMB)

In the right side of the steering column, near the ignition key cylinder

Instrument Panel/Center Console Component Views

Component Connector End Views

Inflatable Restraint I/P Module

In the passenger side of the instrument panel

--

Component Connector End Views

Inflatable Restraint Sensing and Diagnostic Module (SDM)

Under the rear of the center console

--

Component Connector End Views

Inflatable Restraint Side Impact Module - Left

In the side of the drivers seat back

--

Component Connector End Views

Inflatable Restraint Side Impact Module - Right

In the side of the passengers seat back

--

Component Connector End Views

Inflatable Restraint Side Impact Sensor (SIS) - Left

Attached to the drivers B-pillar behind the trim

--

Component Connector End Views

Inflatable Restraint Side Impact Sensor (SIS) - Right

Attached to the passengers B-pillar behind the trim

--

Component Connector End Views

Inflatable Restraint Steering Wheel Module

In the steering wheel

--

Component Connector End Views

Inflatable Restraint Steering Wheel Module Coil

In the steering column, below the steering wheel

--

Component Connector End Views

Input Speed Sensor (ISS) (A/T)

Part of the automatic transaxle

--

--

Instrument Panel Cluster (IPC)

In the top center of the instrument panel

Instrument Panel/Center Console Component Views

Component Connector End Views

Intake Air Temperature (IAT) Sensor

Top of engine on the right back side of the valve cover

Powertrain Component Views

Component Connector End Views

Knock Sensor (KS)

On the rear of the engine block, next to the water inlet neck

Powertrain Component Views

Component Connector End Views

License Lamp

In the center left of the liftgate, above the license plate

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Liftgate Ajar Switch

In liftgate, near license lamp

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Line Pressure Control (PC) Solenoid Valve (A/T)

Part of the automatic transaxle

--

--

Manifold Absolute Pressure (MAP) Sensor

In the rear of the engine compartment, on the cowl panel

Powertrain Component Views

Component Connector End Views

Object Alarm Module (UD7)

--

--

Component Connector End Views

Object Alarm Sensor - Left Rear Middle (UD7)

On the left of the rear bumper, near the license plate

--

Component Connector End Views

Object Alarm Sensor - Right Rear Middle (UD7)

On the right of the rear bumper, near the license plate

--

Component Connector End Views

Octane Selection Switch

Behind the driver side of the instrument panel, near the ECM

--

Component Connector End Views

Outside Rearview Mirror - Driver

On driver door

--

Component Connector End Views

Outside Rearview Mirror - Passenger

On passenger door

--

Component Connector End Views

Outside Rearview Mirror Switch

In the driver side of the instrument panel, under the outboard vent

Instrument Panel/Center Console Component Views

Component Connector End Views

Overdrive Defeat Switch (A/T)

--

--

Component Connector End Views

Overspeed Alarm (U44)

On the side of the I/P fuse block

--

Component Connector End Views

Oxygen Sensor (0.8L)

In the intake manifold

Powertrain Component Views

Component Connector End Views

Park/Neutral Position (PNP) Switch (A/T)

--

--

Component Connector End Views

Park/Turn Signal Lamp - Left (TR3)

On the top left side of the front fascia

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Park/Turn Signal Lamp - Right (TR3)

On the top right side of the front fascia

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Parking Brake Switch

In the center console, on the park brake lever

--

Component Connector End Views

Radio

In the center of the instrument panel

--

Component Connector End Views

Rear Compartment Courtesy Lamp

In the luggage compartment, on the right side

Passenger Compartment/Roof Component Views

Component Connector End Views

Rear Fog Lamp Relay (T98)

On the side of the I/P fuse block

--

--

Rear Object Sensor Control Module (UD7)

--

--

Component Connector End Views

Rear Window Defogger Grid

--

--

--

Rear Window Defogger Switch (except C15)

In the center of the instrument panel, in the HVAC control assembly

Instrument Panel/Center Console Component Views

Component Connector End Views

Rear Window Washer Fluid Pump

In front of the right front wheel, on the windshield washer fluid reservoir

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Rear Window Wiper Motor

In the center of the liftgate

--

Component Connector End Views

Reverse Lockout Solenoid (A/T)

Part of the automatic transaxle

--

--

Rough Road Sensor (1.0L without JL9)

Right front wheel hub near the strut tower

--

Component Connector End Views

Seat Belt Pretensioner - Driver

Inside the B-pillar on the driver seat belt retractor

--

Component Connector End Views

Seat Belt Pretensioner - Passenger

Inside the B-pillar on the passenger seat belt retractor

--

Component Connector End Views

Seat Belt Switch - Driver

In the driver seat belt buckle

--

Component Connector End Views

Shift Solenoid (SS) Valve 1 (A/T)

Part of the automatic transaxle

--

--

Shift Solenoid (SS) Valve 2 (A/T)

Part of the automatic transaxle

--

--

Speaker - Left Front

In the left front door

--

Component Connector End Views

Speaker - Left Rear

Left side of the rear compartment

--

Component Connector End Views

Speaker - Right Front

In the right front door

--

Component Connector End Views

Speaker - Right Rear

Right side of the rear compartment

--

Component Connector End Views

Starter Motor

On the rear of the engine, on the starter motor

--

--

Stop Lamp Switch

Under the driver side of the instrument panel, on the brake pedal

Instrument Panel/Center Console Component Views

Component Connector End Views

Tail Lamp - Left

On the left rear of the vehicle, above the rear bumper

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Tail Lamp - Right

On the right rear of the vehicle, above the rear bumper

Luggage Compartment/Rear of Vehicle Component Views

Component Connector End Views

Theft Deterrent Alarm

Below the left front of the vehicle

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Theft Deterrent Module (TDM)

Behind the driver knee bolster, near the center of the instrument panel

Instrument Panel/Center Console Component Views

Component Connector End Views

Throttle Body (0.8L)

On the rear of the engine

Powertrain Component Views

--

Throttle Body (1.0L)

On the rear of the engine

Powertrain Component Views

Component Connector End Views

Throttle Position (TP) Sensor (0.8L)

On the rear of the engine, on the throttle body

Powertrain Component Views

Component Connector End Views

Transmission Control Module (TCM) (A/T)

--

--

Component Connector End Views

Transmission Fluid Temperature (TFT) Sensor (A/T)

Part of the automatic transaxle

--

--

Trip Odometer Reset Switch

Center of I/P cluster below the speedometer

--

Component Connector End Views

Turn Signal Lamp - Left Front (except TR3)

On the top left side of the front fascia

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Turn Signal Lamp - Right Front (except TR3)

On the top right side of the front fascia

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Turn Signal Repeater Lamp - Left

On the left side of the vehicle, above the wheel well

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Turn Signal Repeater Lamp - Right

On the right side of the vehicle, above the wheel well

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Turn Signal/Hazard Flasher Module

--

--

--

Turn Signal/Multifunction Switch

On the left side of the steering column

Instrument Panel/Center Console Component Views

Component Connector End Views

Variable Effort Steering Actuator

In the right front side of the engine compartment, on the power steering pump

Powertrain Component Views

--

Vehicle Speed Sensor (VSS)

In the left side of the engine compartment, on the top rear of the transmission case

--

Component Connector End Views

Wheel Speed Sensor (WSS) - Left Front

On the left front wheel hub

--

Component Connector End Views

Wheel Speed Sensor (WSS) - Left Rear

On the left rear wheel hub

--

Component Connector End Views

Wheel Speed Sensor (WSS) - Right Front

On the right front wheel hub

--

Component Connector End Views

Wheel Speed Sensor (WSS) - Right Rear

On the right rear wheel hub

--

Component Connector End Views

Window Motor - Driver

In the driver door

--

Component Connector End Views

Window Motor - Left Rear

In the left rear door

--

Component Connector End Views

Window Motor - Passenger

In the passenger front door

--

Component Connector End Views

Window Motor - Right Rear

In the right rear door

--

Component Connector End Views

Window Switch - Driver

On the driver door armrest

--

Component Connector End Views

Window Switch - Left Rear

--

--

Component Connector End Views

Window Switch - Passenger

--

--

Component Connector End Views

Window Switch - Right Rear

--

--

Component Connector End Views

Windshield Washer Fluid Pump

In front of the right front wheel, on the windshield washer fluid reservoir

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

Windshield Wiper Speed Control Relay

--

--

--

Windshield Wiper/Washer Switch

On the right side of the steering column

Instrument Panel/Center Console Component Views

Component Connector End Views

Windshiled Wiper Motor

In the left rear of the engine compartment, on the cowl behind the battery

Front of Vehicle/Engine Compartment Component Views

Component Connector End Views

X105 (8 cavities) (1.0L)

Engine harness to injector harness, top of engine

--

Inline Harness Connector End Views

X201 (26 cavities)

I/P harness to the floor harness, above the left side kickpanel

Harness Routing Views

Inline Harness Connector End Views

X202 (22 cavities) (LHD)

Engine harness to the I/P harness, behind the center of the instrument panel

Harness Routing Views

Inline Harness Connector End Views

X202 (22 cavities) (RHD)

I/P harness to the egnine harness, behind the center of the instrument panel

Harness Routing Views

Inline Harness Connector End Views

X203 (3 cavities)

I/P harness to the air bag harness, above the left side kickpanel

Harness Routing Views

Inline Harness Connector End Views

X204 (4 cavities) (LHD)

Front harness to the I/P harness

--

Inline Harness Connector End Views

X204 (6 cavities) (RHD)

Front harness to the I/P harness

--

Inline Harness Connector End Views

X208 (2 cavities)

Roof harness to the I/P harness

--

Inline Harness Connector End Views

X209 (6 cavities) (LHD with UD7/NQU/C54)

I/P harness to floor harness

--

--

X301 (4 cavities)

Floor harness to front harness

--

Inline Harness Connector End Views

X351 (8 cavities)

I/P harness to driver door harness, in the driver side door frame

Harness Routing Views

Inline Harness Connector End Views

X352 (6 cavities) (A31)

Floor harness to driver door harness, in the driver side door frame

Harness Routing Views

Inline Harness Connector End Views

X361 (8 cavities)

I/P harness to the passenger door harness, in the passenger side door frame

Harness Routing Views

Inline Harness Connector End Views

X371 (6 cavities) (A31)

Floor harness to left rear door harness, in the left rear door frame

Harness Routing Views

Inline Harness Connector End Views

X371 (2 cavities) (except A31)

Floor harness to left rear door harness, in the left rear door frame

Harness Routing Views

Inline Harness Connector End Views

X381 (6 cavities) (A31)

Floor harness to the right rear door harness, in the right rear door frame

Harness Routing Views

Inline Harness Connector End Views

X381 (2 cavities) (except A31)

Floor harness to the right rear door harness, in the right rear door frame

Harness Routing Views

Inline Harness Connector End Views

X401 (6 cavities)

Liftgate harness to floor harness, In the left rear of the luggage compartment, behind the trim panel

Harness Routing Views

Inline Harness Connector End Views

G101

In the left front side of the engine compartment, below the left headlamp

Ground Views

--

G102

In the right front side of the engine compartment, below the right headlamp

Ground Views

--

G103

On the rear of the engine block, between the generator and the starter

Ground Views

--

G104

Mounted to the transaxle case below the vacuum brake booster

--

--

G105

In the left rear of the engine compartment, next to the underhood fuse block

--

--

G106

On the rear of the engine block, on one of the starter bolts

Ground Views

--

G201

Below the left side of the instrument panel, on the I/P fuse block mounting bracket

--

--

G202

Below the center console, next to the SDM

Ground Views

--

G203

Below the center console, in front of the SDM

Ground Views

--

G401

Behind the rear compartment left side trim panel, below the left tail lamp

Ground Views

--

G402

Behind the rear compartment right side trim panel, below the right tail lamp

Ground Views

--

G404

In the liftgate, next to the defogger grid ground side connector

Ground Views

--

J100 (1.0L)

(CKT 808) In the Engine Harness

--

--

J200

(CKT 309) In the Instrument Panel Harness

--

--

J201

(CKT 309) In the Instrument Panel Harness

--

--

J202

(CKT 550) In the Instrument Panel Harness

--

--

J203

(CKT 44) In the Instrument Panel Harness

--

--

J204

(CKT 39) In the Instrument Panel Harness

--

--

J205

(CKT 33) In the Instrument Panel Harness

--

--

J206

(CKT 1340) In the Instrument Panel Harness

--

--

J207

(CKT 840) In the Instrument Panel Harness

--

--

J208

(CKT 550) In the Instrument Panel Harness

--

--

J209

(CKT 650) In the Instrument Panel Harness

--

--

J210 (A32)

(CKT 539) In the Instrument Panel Harness

--

--

J300 (UD7)

(CKT 33) In the Floor Harness

--

--

J301 (A31)

(CKT 1307) In the Floor Harness

--

--

J500 (LHD)

(CKT 550) In the Driver Door Harness

--

--

J501 (LHD)

(CKT 1307) In the Driver Door Harness

--

--

J600 (RHD)

(CKT 550) In the Driver Door Harness

--

--

J601 (RHD)

(CKT 1307) In the Driver Door Harness

--

--