GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Clutch Diode

Front of the engine compartment, near the A/C compressor connector

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A/C Compressor Clutch

Front of the engine

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Engine Controls Connector End Views in 4.0L Engine Controls

A/C Compressor Relay

Fuse/relay center box 3

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Camshaft Position (CMP) Sensor

Front of the engine, near the power steering pump

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Crankshaft Position (CKP) Sensors A and B

Left side of the engine

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Data Link Conn (DLC)

Right side kick panel of the passenger compartment

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Engine Cooling Fans

Behind the radiator

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Engine Cooling Fan Relays

Fuse/relay center box 1

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Engine Coolant Temperature (ECT) Sensor

Right rear of the engine on the cylinder head

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Evaporative Emission (EVAP) Canister Purge Solenoid Valve

On the right center of the engine, mounted to the manifold

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Evaporative Emission (EVAP) Canister Vent Solenoid Valve

On the top of the canister, at the left rear of the vehicle behind the rear bumper

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Fuel Injectors

Mounted on the intake manifold, part of the fuel rail

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Fuel Pump Relay

Fuse/relay center box 3

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Fuel Sending Unit

In the fuel tank

Engine Controls Component Views in 4.0L Engine Controls

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Fuel Tank Unit

At the rear of the vehicle

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Generator

On the front left side of the engine

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Heated Oxygen Sensor Bank 1, Sensor 1

Mounted in the right exhaust pipe

Engine Controls Component Views in 4.0L Engine Controls

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Heated Oxygen Sensor Bank 1, Sensor 2

At the rear of the right catalytic converter

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Heated Oxygen Sensor Bank 2, Sensor 1

Mounted in the left exhaust manifold

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Heated Oxygen Sensor Bank 2, Sensor 2

At the rear of the left catalytic converter

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Idle Air Control (IAC) Valve

On the left rear of the engine, on the throttle body

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Ignition Control Coils/Module

On the right cam cover

Engine Controls Component Views in 4.0L Engine Controls

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Instrument Cluster

On the left side of the IP

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Intake Air Temperature (IAT) Sensor

Part of Mass Air Flow Sensor

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Knock Sensor

At the center of the engine, under the intake manifold

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Manifold Absolute Pressure (MAP) Sensor

Mounted to the left side of the intake manifold by the throttle body

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Manual Transmission

At the rear of the vehicle

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Mass Air Flow (MAF) Sensor

Mounted on the air duct, in back of the intake manifold on the right side

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Powertrain Control Module (PCM)

At the right front of the passenger compartment, behind the fuse/relay center

Engine Controls Component Views in 4.0L Engine Controls

Powertrain Control Module Connector End Views in 4.0L Engine Controls

Radio

In the center of the IP, above the HVAC control

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Throttle Position (TP) Sensor

Mounted to the front of the throttle body

Engine Controls Component Views in 4.0L Engine Controls

Engine Controls Connector End Views in 4.0L Engine Controls

Vehicle Speed Sensor

On the rear left side of the transaxle

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Engine Controls Connector End Views in 4.0L Engine Controls