GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

ABS/TCC Switch

Under the left hand of the instrument panel, near the brake pedal

Antilock Brake System Component Views in ABS

Antilock Brake System Connector End Views in ABS

A/C Clutch

Right hand lower front of the engine, on the A/C compressor

Engine Controls Component Views

Engine Controls Connector End Views

A/C Clutch Diode

Right hand front of the engine, near the A/C compressor in the harness

Engine Controls Component Views

Engine Controls Connector End Views

A/C Clutch Relay

Center rear of the engine compartment, below the right hand underhood block

Power and Grounding Component Views in Wiring Systems

Engine Controls Connector End Views

A/C Pressure Sensor

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

Engine Controls Component Views

Engine Controls Connector End Views

Body Control Module (MALL)

Under the right hand of the instrument panel, near the rear of the instrument panel compartment

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Camshaft Position (CMP) Sensor

Right hand of the engine, below the water pump

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor

Lower right hand of the engine, behind the crank pulley

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Module

Left hand rear of the engine compartment, near the windshield wiper motor

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Under the left hand of the instrument panel, on the instrument panel sound insulator

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data LInk Communications

Electronic Brake and Traction Control Module (EBTCM)

Left hand front of the engine compartment, near the base of the radiator support

Antilock Brake System Component Views in Anti Lock Brake Systems

Antilock Brake System Connector End Views in Anti Lock Brake Systems

Electronic Suspension Control(CCR) Module

Left hand front of the passenger compartment, below the left hand front seat

Suspension Controls Component Views in Real Time Dampening (RTD)

Suspension Controls Connector End Views in Real Time Dampening (RTD)

Engine Coolant Temperature (ECT) Sensor

Left hand front of the engine, near the thermostat housing

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Level Switch

Center front of the engine, in the engine oil pan

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Vent Valve (VIN K)

Left hand front corner of the engine compartment, on the top of the vapor canister

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Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Purge Valve (VIN K)

Right hand front of the engine near the coils.

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

Left hand rear of the engine, near the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injectors

Top of the engine, in the intake runners

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump Control Module

Left hand front of the rear compartment, behind the rear compartment front trim

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Engine Controls Connector End Views

Fuel Tank Pressure Sensor

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

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Sender

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

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Engine Controls Connector End Views

Generator

Right hand of the engine, near the power steering pump

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Head-Up Display

Left hand top of the instrument panel , under the upper instrument panel pad

Instrument Cluster and HUD Component Views in Instrument Panel, Gagues and Console

Instrument Cluster and HUD Connector End Views in Instrument Panel, Gagues and Console

Heated Oxygen Sensor (HO2S) (Bank 1 Sensor 1)

Center rear of the engine, in the exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2 ) (Bank 1 Sensor 2)

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

Engine Controls Component Views

Engine Controls Connector End Views

Heater And A/C Control (Buick with C67)

Center of the instrument panel, near the radio

HVAC Component Views in HVAC systems with A/C - Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual

Heater And A/C Control (Oldsmobile with C61)

Center of the instrument panel, near the radio

HVAC Component Views in HVAC systems with A/C - Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual

Heater And A/C Control (Pontiac with C68)

Center of the instrument panel, near the radio

HVAC Component Views in HVAC systems with A/C - Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual

Heater and A/C Programmer (Pontiac)

Under the right hand of the instrument panel, near the rear of the instrument panel compartment

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

Heater and A/C Programmer (Buick)

Under the right hand of the instrument panel, near the rear of the instrument panel compartment

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

Heater and A/C Programmer (Oldsmobile)

Under the right hand of the instrument panel, near the rear of the instrument panel compartment

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

High-Speed Cooling Fan Relay

Center rear of the engine compartment, below the left hand underhood block

Cooling System Component Views In Engine Cooling

Cooling System Connector End Views in Engine cooling

RH IP Fuse Block

Under the right hand of the instrument panel, near the rear of the instrument panel compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Idle Air Control (IAC) Valve

Left hand of the engine, in the top of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control Module (ICM)

Right hand top of the engine, under the ignition coils

Engine Controls Component Views

Engine Controls Connector End Views

Intake Air Temperature (IAT) Sensor

Left hand front of the engine compartment, in the air intake duct

Engine Controls Component Views

Engine Controls Connector End Views

Instrument Cluster

Left hand of the instrument panel, above the steering column

Instrument Cluster and HUD Component Views in Instrument Panel,Gauges and Console

Instrument Cluster and HUD Connector End Views in Instrument Panel, Gauges and Console

IP Fuse Block

Under the left hand of the instrument panel, on the left hand instrument panel sound insulator

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Knock Sensor Bank 1

Lower right hand rear of the engine, right of the starter motor

Engine Controls Component Views

Engine Controls Connector End Views

Knock Sensor Bank 2

Lower front of the engine, near the engine oil filter adapter

Engine Controls Component Views

Engine Controls Connector End Views

LH Engine Cooling Fan Motor

Center front of the engine compartment, behind the radiator

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

LH Underhood Fuse Block

Center rear of the engine compartment, near the cowl

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Low Speed Engine Cooling Fan Relay

Center rear of the engine compartment, below the left hand underhood block

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Manifold Absolute Pressure (MAP) Sensor

Right hand center of the engine, near the generator

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow (MAF) Sensor

Center left hand of the engine, on the top of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Oil Life Reset Switch

Right hand of instrument panel,in instrument panel compartment

Engine Controls Component Views

Engine Controls Connector End Views

Park/Neutral Position (PNP) Switch

Left hand of the transaxle, below the exhaust gas recirculation valve

Tilt Wheel/Column Component Views in Steering Wheel Column - Tilt

Engine Controls Connector End Views

Powertrain Control Module (PCM)

Left hand front of the engine compartment, near the air cleaner housing

Engine Controls Component Views

Powertrain Control Module Connector End Views

Remote Indicator Bank

Left hand of the instrument panel, near the instrument cluster

Instrument Cluster and HUD Component Views in Instrument Panel, Gauges and Console

Instrument Cluster and HUD Connector End Views in Instrument Panel, Gauges and Console

RH Engine Cooling Fan Motor

Center front of the engine compartment, behind the radiator

Cooling System Component Views In Engine Cooling

Cooling System Connector End Views in Engine Cooling

RH Underhood Fuse Block

Center rear of the engine compartment, near the cowl

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Shift Select Switch

Center front of the passenger compartment,under the front of the center console

Suspension Controls Component Views in Real Time Dampening (RTD)

Suspension Controls Connector End Views in Real Time Dampening (RTD)

Super Charger Bypass Vale

Left hand front of the engine, near the engine oil fill

Engine Controls Component Views

Engine Controls Connector End Views

Theft Deterrent Module

Under the right hand of the instrument panel, near the rear of the instrument panel compartment

Theft Deterrent System Component Views in Theft Deterent

Theft Deterrent System Connector End Views in Theft Deterent

Throttle Position Sensor

Center left hand of the engine, on the front of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Vehicle Speed Sensor (VSS)

Right hand rear of the transaxle, below the power steering pump

Engine Controls Component Views

Engine Controls Connector End Views

C100 (20 cavities)

Engine harness to the transaxle, left hand front of the engine compartment below the throttle body

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101 (66 cavities)

Body harness to the engine harness, right hand rear of the engine compartment near the strut tower

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C107 (8 cavities) (VIN 1)

Engine harness to the ignition harness , right hand front of the engine near the ignition coils

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C107 (8 cavities) (VIN K)

Engine harness to the ignition harness , right hand front of the engine near the ignition coils

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C111 (1 cavity)

Engine harness to the knock sensor harness, right hand rear of the engine below the power steering pump

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (116 cavities)

Body harness to the instrument panel harness, under the center of the instrument panel

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C420

under the center rear of vehicle

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G100 (VIN K)

Right hand front of the engine, under the ignition control module bracket

Power and Grounding Component Views in Wiring Systems

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G100 (VIN 1)

Right hand front of the engine, under the ignition control module bracket

Power and Grounding Component Views in Wiring Systems

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G101

Right hand rear of the engine, below the power steering pump

Power and Grounding Component Views in Wiring Systems

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G104

Left hand front of the engine compartment, near the air cleaner housing

Power and Grounding Component Views in Wiring Systems

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G105

Right hand front of the engine compartment, near the battery

Power and Grounding Component Views in Wiring Systems

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G201

Right hand front of the passenger compartment, behind the right hand kick panel trim plate

Power and Grounding Component Views in Wiring Systems

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G202

Left hand front of the passenger compartment, behind the left hand kick panel trim plate

Power and Grounding Component Views in Wiring Systems

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P100

Left hand rear of the engine compartment, near the left hand front strut tower

Harness Routing Views in Wiring Systems

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P101

Right hand rear of the engine compartment, near the right hand front strut tower

Harness Routing Views in Wiring Systems

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P403

Right hand front of the rear compartment, in the rear compartment floor

Harness Routing Views in Wiring Systems

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S104

In the body harness, approx 27 cm (9.8in) into the cooling fan relay breakout

Harness Routing Views in Wiring Systems

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S106

In the engine harness, approx 6 cm (2.3in) from the A/C compressor clutch

Harness Routing Views in Wiring Systems

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S107

In the engine harness, approx 6 cm (2.3in) from the A/C compressor clutch

Harness Routing Views in Wiring Systems

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S110 (VIN K)

In the engine harness, approx 6.5 cm(2.5in) from the generator breakout

Harness Routing Views in Wiring Systems

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S110 (VIN 1)

In the engine harness, approx 6.5 cm (2.5in) from the generator breakout

Harness Routing Views in Wiring Systems

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S114 (VIN 1)

In the engine harness, approx 11 cm (4.3in) from the fuel injector breakout

Harness Routing Views in Wiring Systems

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S114 (VIN K)

In the engine harness, approx 12 cm (4.7in) from the heated oxygen sensor connector breakout

Harness Routing Views in Wiring Systems

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S121 (VIN 1)

In the engine harness, approx 32 cm (12.6in) from C101

Harness Routing Views in Wiring Systems

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S121 (VIN K)

In the engine harness, approx 32 cm (12.6in) from C101

Harness Routing Views in Wiring Systems

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S122 (VIN 1)

In the engine harness, approx 10 cm (3.9in) from the intake air temperature sensor

Harness Routing Views in Wiring Systems

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S122 (VIN K)

In the engine harness, approx 47 cm (18.5in) from C101

Harness Routing Views in Wiring Systems

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S123 (VIN 1)

In the engine harness, approx 53.5 cm (21in) from C101

Harness Routing Views in Wiring Systems

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S123 (VIN K)

In the engine harness, approx 53.5 cm (21in) from C101

Harness Routing Views in Wiring Systems

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S124

In the body harness, approx 10 cm(3.9in) from the electronic brake and traction control

Harness Routing Views in Wiring Systems

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S126 (VIN 1)

In the engine harness, approx 13 cm (5.1in) from the mass air flow sensor

Harness Routing Views in Wiring Systems

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S126 (VIN K)

In the engine harness, approx 18.5 cm (7.2in) from the mass air flow sensor

Harness Routing Views in Wiring Systems

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S128

In the body harness, approx 6.5 cm (2.5in) from the engine cooling fan breakout

Harness Routing Views in Wiring Systems

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S130 (VIN 1)

In the engine harness, approx 25.5 cm (10in) from C101

Harness Routing Views in Wiring Systems

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S130 (VIN K)

In the engine harness, approx 25.5 cm (10in) from C101

Harness Routing Views in Wiring Systems

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S135 (VIN K)

In the ignition control module harness, approx 18.5 cm (7.3in) from the ignition control module

Harness Routing Views in Wiring Systems

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S135 (VIN 1)

In the ignition control module harness, approx 18.5 cm (7.3in) from the ignition control module

Harness Routing Views in Wiring Systems

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S136 (VIN K)

In the ignition control module harness, approx 12 cm (4.7in) from the ignition control module

Harness Routing Views in Wiring Systems

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S136 (VIN 1)

In the ignition control module harness, approx 12 cm (4.7in) from the ignition control module

Harness Routing Views in Wiring Systems

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S206

In the instrument panel harness, approx 60.0 cm (23in) from the radio breakout

Harness Routing Views in Wiring Systems

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S207

In the body harness, approx 12 cm (4.7in) from the center instrument panel harness channel breakout

Harness Routing Views in Wiring Systems

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S221

In the body harness, approx 15.5 cm (6.1in) from P100

Harness Routing Views in Wiring Systems

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S222

In the body harness, approx 15.5 cm(6.1in) from P100

Harness Routing Views in Wiring Systems

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S225

In the body harness, approx 49.5 cm (19.4in) from the top edge of the left hand kick wall channel

Harness Routing Views in Wiring Systems

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S226

In the body harness, approx 31.5 cm (12.4in) from the data link connector

Harness Routing Views in Wiring Systems

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S233

In the body harness, approx 22 cm (8.6in) into the C101 breakout

Harness Routing Views in Wiring Systems

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S239

In the body harness, approx 26 cm (10.2in) from the center instrument panel harness channel breakout

Harness Routing Views in Wiring Systems

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S241

In the body harness, approx 40 cm (15.7in) from the interior lamp control module breakout

Harness Routing Views in Wiring Systems

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S246

In the body harness, approx 8 cm (3.1in) from the interior lamp control module breakout

Harness Routing Views in Wiring Systems

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S249 (Buick)

In the instrument panel harness, approx 9 cm (3.5in) from the instrument cluster C1 breakout

Harness Routing Views in Wiring Systems

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S249 (Oldsmobile)

In the instrument panel harness, approx 17 cm (6.7in) from C200

Harness Routing Views in Wiring Systems

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S249 (Pontiac)

In the instrument panel harness, approx 3.5 cm (1.3in) from the instrument cluster C1 breakout

Harness Routing Views in Wiring Systems

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S255

In the instrument panel harness, approx 7 cm (2.7in) from the instrument cluster C1 breakout

Harness Routing Views in Wiring Systems

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S256

In the body harness, approx 33.5 cm (13.1in) from the interior lamp control module breakout

Harness Routing Views in Wiring Systems

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S270

In the body harness, approx 8 cm (3.1in) from the edge of the right hand instrument panel harness channel end

Harness Routing Views in Wiring Systems

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S271

In the body harness, approx 12 cm (4.7in) into the C101 breakout

Harness Routing Views in Wiring Systems

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S273

In the body harness, approx 17 cm (6.7in) into the C101 breakout

Harness Routing Views in Wiring Systems

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S276

In the instrument panel harness, approx 43 cm (18in) from C200

Harness Routing Views in Wiring Systems

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S278

In the body harness, approx 42.5 cm (16.7in) from the remote function actuator module breakout

Harness Routing Views in Wiring Systems

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S279

In the body harness, approx 2 cm (0.7in) from the edge of the right hand instrument panel harness channel end

Harness Routing Views in Wiring Systems

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S284

In the body harness, approx 27 cm (10.6in) from the interior lamp control module breakout

Harness Routing Views in Wiring Systems

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S299 (Buick)

In the instrument panel harness, approximatley 12 cm (4.7in) into the instrument cluster C1 breakout

Harness Routing Views in Wiring Systems

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S299 (Pontiac)

In the instrument panel harness, approximatley 12.5 cm (4.9in) into the instrument cluster C1 breakout

Harness Routing Views in Wiring Systems

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S308

In the body ahrness, approximatley 33 cm (13.0in) from G201 breakout

Harness Routing Views in Wiring Systems

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S415

In the body harness, approx 22.5 cm (8.8in) from P403

Harness Routing Views in Wiring Systems

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SP340

Left hand front of the passenger compartment, below the front door sill trim panel

Harness Routing Views in Wiring Systems

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