GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch Coil

Attached to the LH front of the engine block, part of the A/C compressor

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HVAC Connector End views in HVAC Systems

A/C Compressor Diode

At the A/C compressor clutch coil connector

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A/C Compressor Refrigerant Pressure Switch

LH front of the engine compartment, mounted in the A/C compressor/condenser hose, below the A/C load switch

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

A/C Compressor Relay K60

LH front of the engine compartment, in the ECM housing, at position 17

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HVAC Connector End views in HVAC Systems

A/C Load Switch

LH front of the engine compartment, mounted in the A/C compressor/condenser hose

Cooling System Component Views in Engine Cooling

HVAC Connector End views in HVAC Systems

Camshaft Position (CMP) Sensor

Front of the engine block

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Coolant Fan Test Connector

LH front of the engine compartment, in the ECM housing, at position 5

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Cooling System Connector End Views in Engine Cooling

Crankshaft Position (CKP) Sensor

RH rear of the engine block

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Data Link Connector (DLC)

Attached to the I/P carrier, to the left of the steering column

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Power and Grounding Connector End Views in Wiring Systems

ECM Housing

LH front of engine compartment

Engine Controls Component Views in Engine Controls

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Electronic Brake/Traction Control Module (EBTCM)

LH front of the engine compartment, mounted to the lower rail

Antilock Brakes System Component Views in Antilock Brakes

Antilock Brakes System Connector End Views in Antilock Brakes

Engine Controls Power Relay K43

LH front of the engine compartment, in the ECM housing, at position 9

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Engine Controls Connector End Views in Engine Controls

Engine Control Module (ECM)

LH front of the engine compartment, in the ECM housing, at position 1

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Engine Coolant Temperature (ECT) Sensor

Mounted in coolant bridge

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Evaporative (EVAP) Purge Solenoid Valve

RH rear of the intake manifold plenum

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Evaporative (EVAP) Tank Solenoid Valve

RH rear of engine compartment, attached to the strut tower

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuel Injectors (Sequential Multiport) #1 through #6

On top of engine, along each side of the intake manifold

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuel Pump

Underneath the rear of the vehicle, inside of the fuel tank

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Engine Controls Connector End Views in Engine Controls

Fuel Pump Relay K44

LH front of the engine compartment, in the ECM housing, at position 8

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Engine Controls Connector End Views in Engine Controls

Fuel Tank Pressure Sensor

Underneath the rear of the vehicle, inside of the fuel tank

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Engine Controls Connector End Views in Engine Controls

Fuse #43

LH front of the engine compartment, in the ECM housing, at position 2

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Fuse Block

Mounted to the I/P, lower LH side of steering column

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Gauge Cluster

LH side of the I/P, just to the left and above the heater and A/C control

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

Heated Oxygen Sensor (HO2S Bank 1 Position 1)

Located in RH front pipe of the exhaust catalytic converter

Automatic Transmission Component Views in Automatic Transmission

Engine Controls Connector End Views in Engine Controls

Heated Oxygen Sensor (HO2S Bank 1 Position 2)

Located in RH rear pipe of the exhaust catalytic converter

Automatic Transmission Component Views in Automatic Transmission

Engine Controls Connector End Views in Engine Controls

Heated Oxygen Sensor (HO2S Bank 2 Position 1)

Located in LH front pipe of the exhaust catalytic converter

Automatic Transmission Component Views in Automatic Transmission

Engine Controls Connector End Views in Engine Controls

Heated Oxygen Sensor (HO2S Bank 2 Position 2)

Located in LH rear pipe of the exhaust catalytic converter

Automatic Transmission Component Views in Automatic Transmission

Engine Controls Connector End Views in Engine Controls

Heater and A/C Control

Center of I/P, above the radio

Instrument Cluster Component Views in Instrument Panel, Gauges and Console

HVAC Connector End Views in HVAC Systems

Idle Air Control (IAC) Valve

Attached to the LH side of the intake manifold plenum

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Ignition Coil

Mounted on the LH rear of the engine block

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Ignition Switch

Mounted on the upper RH side of the steering column

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Starter and Charging Connector End Views in Engine Electrical

Instrument Cluster

LH side of the I/P, above the steering column

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

Intake Air Temperature (IAT) Sensor

RH front of the engine compartment

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Intake Plenum Switch-Over Solenoid Valve

LH rear of the engine

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Intake Resonance Switch-Over Solenoid Valve

Attached to rear of the resonance chamber

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Knock Sensor (KS Bank 1)

RH side of the engine block

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Knock Sensor (KS Bank 2)

LH side of the engine block

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Mass Air Flow (MAF) Sensor

In the air intake passage, between the air cleaner and the resonance chamber

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Power Distribution Fuse Block

LH front of the engine compartment, attached to the ECM housing, above the battery

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Secondary Air Injection Pump

Attached to the LH front rail, under the wheelhouse

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Engine Controls Connector End Views in Engine Controls

Secondary Air Injection Pump Relay K12

LH front of the engine compartment, in the ECM housing, at position 21

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Engine Controls Connector End Views in Engine Controls

Secondary Air Injection Pump Solenoid Valve

Front center of engine compartment, beneath secondary air injection switch-over valve

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Engine Controls Connector End Views in Engine Controls

Spark Plugs

Top of the engine

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Theft Deterrent Module

Mounted to the ignition lock cylinder on the upper RH side of the steering column

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Theft Deterrent Connector End Views in Theft Deterrent

Throttle Position (TP) Sensor

Attached to throttle body

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Transmission Control Module (TCM)

Behind the RH side of the I/P

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AT Inline Harness Connector End Views in Automatic Transmission

C101

I/P wiring harness to ECM wiring harness, in the LH front of the engine compartment

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Inline Harness Connector End Views in Wiring Systems

C105 (white connector)

I/P wiring harness to ECM wiring harness, located at LH front of the engine compartment, just behind the battery

Wiper/Washer System Component Views in Wiper/Washer System

Inline Harness Connector End Views in Wiring Systems

C106 (blue connector)

I/P wiring harness to ECM wiring harness, located at LH front of the engine compartment, just behind the battery

Wiper/Washer System Component Views in Wiper/Washer System

Inline Harness Connector End Views in Wiring Systems

C110

ECM wiring harness to A/C control wiring harness, in the ECM housing

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Inline Harness Connector End Views in Wiring Systems

C112

ECM wiring harness to fuel injector wiring harness, at the top front of the engine block

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Inline Harness Connector End Views in Wiring Systems

C200A

I/P wiring harness to body wiring harness, at lower LH A-pillar

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200B

I/P wiring harness to body wiring harness, at lower LH A-pillar

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C400

Body wiring harness to fuel sender wiring harness, beneath the vehicle, near the front of the fuel tank

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Inline Harness Connector End Views in Wiring Systems

G101

ECM wiring harness, attached to the negative battery cable terminal

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G102

ECM wiring harness, attached to the negative battery cable terminal

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G103

Body and I/P wiring harnesses, located at the LH front of the engine compartment, near C102, C105, and C106

Wiper/Washer System Component Views in Wiper/Washer System

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G400

Body wiring harness, located in the lower LH corner of the rear compartment, near the LH stop/taillamp

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P103

Lower LH A-pillar, forward of G200

Power and Grounding Component Views in Wiring Systems

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P104

LH engine compartment, at the front of the ECM housing

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P106

RH rear of the engine compartment

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P108

In the LH engine compartment, at the rear of the ECM housing

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P110

Rear LH corner of the engine compartment

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P400

Approximately 30 cm from the RH rear wheel speed sensor

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S103

Body wiring harness, approximately 27 cm from P107 branch break off

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S104

Body wiring harness, approximately 83 cm from P103, near P107 branch break off

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S106

Body wiring harness, approximately 83 cm from P103, near P107 branch break off

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S109

A/C control wiring harness, approximately 12 cm from the C111 branch break off

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S110

A/C control wiring harness, approximately 12 cm from the C111 branch break off

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S119

ECM wiring harness, in the ECM housing, near the ECM connector

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S120

ECM wiring harness, in the ECM housing, near the ECM connector

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S121

ECM wiring harness, in the ECM housing, near the ECM connector

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S122

ECM wiring harness, in the ECM housing, near the ECM connector

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S123

ECM wiring harness, in the ECM housing, near the ECM connector

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S124

ECM wiring harness, in the ECM housing, near the ECM connector

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S128

ECM wiring harness, in the ECM housing, near the ECM connector

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S129

ECM wiring harness, in the ECM housing, near the ECM connector

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S130

ECM wiring harness, in the ECM housing, near the ECM connector

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S131

ECM wiring harness, in the ECM housing, near the ECM connector

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S150

Fuel injector wiring harness, near the C112 branch break off

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S160

A/C control wiring harness, inside ECM housing, near P104

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S204

I/P wiring harness, near multifunction relay K134 connector branch break off

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S214

I/P wiring harness, near data link connector (DLC) branch break off

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S215

I/P wiring harness, near data link connector branch break off

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S228

I/P wiring harness, near G201 branch break off

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S400

Body wiring harness, approximately 23 cm from the RCDLR branch break off

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