GM Service Manual Online
For 1990-2009 cars only

Engine Component Location

Name

Location

Locator View

Connector End View

A/C Clutch

Front side of engine on A/C compressor

HVAC Component Views in HVAC Systems - Automatic

HVAC Connector End Views in HVAC Systems - Automatic

A/C Pressure Sensor

Front side of engine on A/C line behind A/C compressor

HVAC Component Views in HVAC Systems - Automatic

HVAC Connector End Views in HVAC Systems - Automatic

Cruise Control Module

In the engine compartment on the LH strut tower

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector

Lower LH side of instrument panel

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

Electronic Brake (and Traction) Control Module (EBCM)

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

Antilock Brake System Component Views in ABS

Antilock Brake System Connector End Views in ABS

Engine Coolant Level Sensor

Front left side of engine compartment on the radiator left tank

Engine Controls Component Views

Engine Controls Connector End Views

Engine Coolant Temperature (ECT) Sensor

Front LH side of engine lower side of intake under thermostat housing

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Level Switch

Front of engine oil pan

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Pressure Sensor

RH side of engine under Power steering pump

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Purge Valve

On top of engine front of intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

On top of engine rear of intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injector 1

Top front of engine on fuel rail on intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injector 2

Top rear of engine on fuel rail on intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injector 3

Top front of engine on fuel rail on intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injector 4

Top rear of engine on fuel rail on intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injector 5

Top front of engine on fuel rail on intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injector 6

Top rear of engine on fuel rail on intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Generator

RH side top of engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Heads Up Display (HUD)

Upper LH center of instrument panel, aboe the instrument cluster

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

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

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

Front of the engine compartment on the exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

Rear of the engine compartment on the rear exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Idle Air Control (IAC) Valve

Top RH side of engine on the top of the throttle body,near the rear of the throttle body.

Engine Controls Component Views

Engine Controls Connector End Views

Instrument Cluster (IPC)

In the front passenger compartment,center LH side of instrument panel

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

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

Intake Air Temperature (IAT) Sensor

On top of air intake hose between throttle body and air cleaner housing

Engine Controls Component Views

Engine Controls Connector End Views

Knock Sensor (KS) Bank 1

Front of engine above starter in engine block

Engine Controls Component Views

Engine Controls Connector End Views

Knock Sensor (KS) Bank 2

Rear of engine

Engine Controls Component Views

Engine Controls Connector End Views

Manifold Absolute Pressure (MAP) Sensor

On top of engine rear of intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow (MAF) Sensor

Top of engine RH side of engine top of front of throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Power Steering Pressure Sensor

On power steering rack and pinon unit near input shaft

Engine Controls Component Views

Engine Controls Connector End Views

Powertrain Control Module (PCM)

Front LH side of engine compartment under air cleaner box

Engine Controls Component Views

Powertrain Control Module Connector End Views

Rear Fuse Block

Under RH side of rear passenger compartment seat

Power and Grounding Component Views in Power and Grounding

Power and Grounding Connector End Views in Power and Grounding

Secondary Air Injection Bypass Valve Solenoid

Located on the top of the air pump

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection Pump Motor

Front RH coner of engine

Engine Controls Component Views

Engine Controls Connector End Views

Starter Solenoid

Lower center front of engine on starter

Engine Controls Component Views

Engine Controls Connector End Views

Throttle Position (TP) Sensor

Top of engine RH side of engine, front of throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Underhood Fuse Block

Front LH side of engine comartment

Power and Grounding Component Views in Power and Grounding

Power and Grounding Connector End Views in Power and Grounding

Vehicle Speed Sensor (VSS)

On top of RH side transmission output housing

Engine Controls Component Views

Engine Controls Connector End Views

C100

LH top of transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101

In engine compartment near LH strut tower

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103

Top front of engine above fuel rail

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C104

Left side middle of engine compartment on the frame rail

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

LH lower front corner of passenger compartment on underside of instrument panel (Body Harness to I/P Round Harness)

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C201

RH lower front corner of passenger compartment on underside of instrument panel (Body Harness to I/P Round Harness)

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C215

Center front of passenger compartment on Center of instrument panel (Body Harness to I/P Flex Harness)

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C420

In the right rear wheel well on the frame rail

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G100

LH side of engine on top of Transmission

Harness Routing Views in Wiring Systems

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G104

LH side of engine on top of Transmission

Harness Routing Views in Wiring Systems

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G105

Rear of engine behind power steering pump

Harness Routing Views in Wiring Systems

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G107

Front left corner of the engine compartment on top of frame rail infront of the Undehood Fuse Block

Harness Routing Views in Wiring Systems

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G302

Behind the left rear C-pillar interior trim panel

Harness Routing Views in Wiring Systems

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G401

On the lower right corner of the trunk forward of the tail lamp

Harness Routing Views in Wiring Systems

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P100

LH lower front corner of passenger compartment on bulk head

Harness Routing Views in Wiring Systems

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P102

Right lower front corner of passenger compartment on bulk head

Harness Routing Views in Wiring Systems

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P401

Behind Left rear tailight assembly

Harness Routing Views in Wiring Systems

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S100

In the forward lamp harness 4.0 cm (1.6 in) from the G103 breakout

Harness Routing Views in Wiring Systems

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S101

In Engine Harness 12.5 cm (4.9 in) From RH Front Wheel Speed Sensor Breakout

Harness Routing Views in Wiring Systems

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S102

In Engine Harness 19.0 cm (7.4 in) From RH Front Wheel Speed Sensor Breakout

Harness Routing Views in Wiring Systems

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S103

In Engine Harness 49.0 cm (19.3)From LH Front Wheel Speed Sensor Breakout

Harness Routing Views in Wiring Systems

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S104

In Engine Harness 42.5 cm (16.7 in) From LH Front Wheel Speed Sensor Breakout

Harness Routing Views in Wiring Systems

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S105

In Engine Harness 9.5 cm (3.7 in) From the PCM C1 Connector

Harness Routing Views in Wiring Systems

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S106

In Engine Harness 6.5 CM (2.5 in) from the idle air control (IAC) valve connector breakout

Harness Routing Views in Wiring Systems

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S107

In Engine Harness 23CM (9.0 in) from the A/C clutch connector breakout

Harness Routing Views in Wiring Systems

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S108

In Engine Harness 18 CM (7.0 in) from the A/C clutch connector breakout

Harness Routing Views in Wiring Systems

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S212

In the body harness 56 cm (22 in) rear of the DIM breakout

Harness Routing Views in Wiring Systems

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S216

In the Body Harness LH side of vehicle 17.0 (6.7 in) cm from Pass Through P100

Harness Routing Views in Wiring Systems

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S308

In the Body Harness right side of vehicle 5.5 cm (2.6 in) from rear fuse block breakout

Harness Routing Views in Wiring Systems

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