GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Pressure Sensor

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

Engine Controls Component Views

Engine Controls Connector End Views

ABS/TCC Switch (LH Drive)

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

Engine Controls Component Views

Engine Controls Connector End Views

ABS/TCC Switch (RH Drive)

Under right hand 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 hand rear corner of the engine, in the cam carrier, near the power steering pump

Engine Controls Component Views

Engine Controls Connector End Views

Continuously Variable Road Sensing Suspension (CVRSS) 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

Crankshaft Position (CKP) Sensor A

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

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor B

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

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Module (LH Drive)

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

Cruise Control Module (RH Drive)

Center rear of the engine compartment, above the ignition coils

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC) (LH Drive)

Under left hand of the instrument panel near the steering column

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Data Link Connector (DLC) (RH Drive)

Under right hand of the instrument panel near the steering column

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Electronic Brake and Traction Control Module (EBTCM)

Left hand front corner of the engine compartment, below the air cleaner housing

Antilock Brake System Component Views in Antilock Brake Systems

Antilock Brake System Connector End Views in Antilock Brake Systems

Engine Coolant Temperature (ECT) Sensor

Left hand rear corner of the engine, below the exhaust gas recirculation valve

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Level Switch

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

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Pressure Switch

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

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Purge Valve

Left hand rear of the engine, on the cam cover, near the ignition coils

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Vent Valve

Left hand rear of the engine on the cam cover, near the ignition coils

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

Left hand rear corner of the engine, near the throttle body

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 Tank Pressure Sensor

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

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Unit

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

Engine Controls Component Views

Engine Controls Connector End Views

Generator

Right hand front corner of the engine, near the underhood bussed electrical center

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

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

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 3

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

Engine Controls Component Views

Engine Controls Connector End Views

Idle Air Control (IAC) Valve

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

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control Module (ICM)

Center rear of the engine, under the ignition coils on the rear cam cover

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Switch (LH Drive)

Left hand of the instrument panel, right of the steering column in the instrument panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Ignition Switch (RH Drive)

Right hand of the instrument panel, right of the steering column in the instrument panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Instrument Cluster

Left hand of the instrument panel, above the steering column

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

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

Instrument Cluster

Right hand of the instrument panel, above the steering column

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

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

Intake Air Temperature (IAT) Sensor

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

Engine Controls Component Views

Engine Controls Connector End Views

Knock Sensor

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 hand 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

Rear of the engine, near the ignition coils

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow (MAF) Sensor

Center left hand of the engine, on the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

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

Park/Neutral Position (PNP) Switch

Left hand of the transaxle, below the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Power Steering Pressure (PSP) Switch

Right hand rear corner of the engine compartment, below the windshield wiper motor on the high pressure power steering line

Engine Controls Component Views

Engine Controls Connector End Views

Powertrain Control Module (PCM)

Left hand front corner of the engine compartment, below the air cleaner

Engine Controls Component Views

Powertrain Control Module Connector End Views

Rear Fuse Block

Left hand rear of the pasenger compartment, under the rear seat

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

RH Engine Cooling Fan Motor

Right hand front of the engine compartment, behind the radiator

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Theft Deterrent Module (LH Drive)

Left hand of the instrument panel, right of the steering column

Theft Deterrent System Component Views in Theft Deterent

Theft Deterrent System Connector End Views in Theft Deterent

Theft Deterrent Module (RH Drive)

Right hand of the instrument panel, right of the steering column

Theft Deterrent System Component Views in Theft Deterent

Theft Deterrent System Connector End Views in Theft Deterent

Throttle Position (TP) Sensor

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

Engine Controls Component Views

Engine Controls Connector End Views

Underhood Fuse Block

Right hand rear of the engine compartment, near the power steering pump

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Speed Sensor (VSS)

Right hand 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 engine harness, left hand 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 body harness, left hand of the engine compartment near the coolant reservoir

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C107 (2 cavities)

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C127 (20 cavities)

Fuel rail harness to engine harness, left hand of the engine near the transmission fluid level indicator

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (30 cavities) (LH Drive)

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (30 cavities) (RH Drive)

Instrument panel harness to body harness, under left hand 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

C201 (30 cavities)

Instrument panel harness to body harness, under right hand 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

C201 (30 cavities)

Instrument panel harness to body harness, under right hand of the instrument panel near the accelarator pedal

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C420 (7 cavities)

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

Left hand of the engine compartment, below the engine coolant reservoir

Power and Grounding Component Views in Wiring Systems

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G103

Lower right hand rear of the engine, near the power steering rack

Power and Grounding Component Views in Wiring Systems

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G104

Right hand of the engine compartment, below the underhood bussed electrical center

Power and Grounding Component Views in Wiring Systems

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G200

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

Power and Grounding Component Views in Wiring Systems

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G201

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

Power and Grounding Component Views in Wiring Systems

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G301

Under the left hand front corner of the rear seat

Power and Grounding Component Views in Wiring Systems

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G401

Right hand rear corner of the rear compartment, near the C403 connector

Power and Grounding Component Views in Wiring Systems

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P100

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

Harness Routing Views in Wiring Systems

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P101

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

Harness Routing Views in Wiring Systems

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P400

Left hand side of the rear compartment, near the wheelhouse

Harness Routing Views in Wiring Systems

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P401

Right hand rear corner of the rear compartment, near the C403 connector

Harness Routing Views in Wiring Systems

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S110

Fuel injector harness, center top of the engine approximately 20 cm (7.87 in) from the C127 connector

Harness Routing Views in Wiring Systems

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S111

Fuel injector harness, center top of the engine approximately 20.0 cm (10.4 in) from the C127 connector

Harness Routing Views in Wiring Systems

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S113

Transaxle harness, right hand of the engine approximately 50 cm (19.7 in) from the fluid pressure manual position switch

Harness Routing Views in Wiring Systems

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S201

Body harness left hand of the instrument panel, approximately 16 cm (9.0 in) from P101

Harness Routing Views in Wiring Systems

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S205

Instrument panel harness, center of the instrument panel approximately 94.5 cm (37.2 in) from the radio connector

Harness Routing Views in Wiring Systems

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S210

Instrument panel harness, left hand of the instrument panel approximately 10.5 cm (8.7 in) from the left hand solar sensor harness breakout

Harness Routing Views in Wiring Systems

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S212

Instrument panel harness, left hand of the instrument panel approximately 44 cm (17.3 in) from C205 harness breakout

Harness Routing Views in Wiring Systems

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S213

Instrument panel harness, center of the instrument panel approximately 88 cm (34.6 in) from the radio connector

Harness Routing Views in Wiring Systems

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