GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Clutch Diode

Sealed in a harness, approximately 3 cm (1.2 in) from the injector 2 breakout

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A/C Compressor Clutch

In the front of the engine, on the lower right side

HVAC Component Views in HVAC with A/C Manual

Engine Controls Connector End Views

A/C Refrigerant Pressure Sensor

Above the right front wheelhouse, attached to the refrigerant line

HVAC Component Views in HVAC with A/C Manual

Engine Controls Connector End Views

Automatic Transmission

Behind the engine

Antilock Brake System Component Views in ABS Traction Control

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Body Control Module (BCM)

Under the right side of the IP near the blower motor

Body Control System Component Views in Body Control Systems

Body Control System Connector End Views in Body Control Systems

Camshaft Position (CMP) Sensor

Mounted in the top rear center of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor

In the lower front of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control (Clutch) Switch

Mounted in the clutch pedal bracket

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Cruise Control Module

Mounted to the left frame rail, forward of the wheelhouse

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Cruise Control Release (Brake) Switch

Mounted in the upper hole of the brake pedal bracket

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Under the IP, right of the steering column

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Electronic Brake Control Module (EBCM)

Mounted with brake pressure modulator valve on the top of the left front frame rail

Antilock Brake System Component Views in ABS Traction Control

Antilock Brake System Connector End Views in Antilock Brake System

Electronic Ignition Control Module (ICM)

On the top front left side of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Engine Coolant Temperature (ECT) Sensor

Under the throttle body, on the front side of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Engine Cooling Fans

Behind the radiator

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Engine Oil Level Switch

On the lower left side of the engine, in the oil pan

Engine Controls Component Views

Engine Controls Connector End Views

Engine Wiring Harness Junction Block 1

In the left front corner of the engine compartment

Power and Grounding Component Views in Wiring Systems

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Engine Wiring Harness Junction Block 2

In the left front corner of the engine compartment

Power and Grounding Component Views in Wiring Systems

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Evaporative Emission (EVAP) Canister Purge Solenoid Valve

On the right side of the engine next to injector 2

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Engine Controls Connector End Views

Evaporative Emission (EVAP) Canister Vent Solenoid Valve

On the top right side of the engine, part of the EVAP canister

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Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

On the front left side of the engine, in front of the ignition control module

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injectors

Mounted on the intake manifold, part of the fuel rail

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Unit

Under the rear of the vehicle

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Engine Controls Connector End Views

Fusible Links

Forward of the left front wheelhouse, behind the underhood electrical center 2

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Generator

On the front right side of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Heated Oxygen Sensor Bank 1, Sensor 1

Mounted in the left exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor Bank 1, Sensor 2

At the rear of the catalytic converter

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Engine Controls Connector End Views

Heated Oxygen Sensor Bank 2, Sensor 1

Mounted in the right exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

HVAC Control

In the center of the IP, above the radio

HVAC Component Views in HVAC with A/C Manual

HVAC Connector End Views in HVAC with A/C Manual

Instrument Cluster

On the left side of the IP

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

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

Intake Air Temperature (IAT) Sensor

Mounted on the air duct, in front of the intake manifold

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Engine Controls Connector End Views

IP Fuse Block

On the left end of the IP carrier

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

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Knock Sensor, Left

In the bottom left side of the engine block

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Knock Sensor, Right

In the bottom right side of the engine block

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Manifold Absolute Pressure (MAP) Sensor

Mounted to the right side of the intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow (MAF) Sensor

Mounted on the air duct, in front of the intake manifold

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Engine Controls Connector End Views

Multi-function Lever

On the left side of the steering column

Cruise Control Component Views in Cruise Control

Wiper/Washer Connector End Views in Wipers/Washer System

Park/Neutral Position Switch

Under the center console, on the base of the shift control lever

Shift Lock Control Component Views in Automatic Transmission

Engine Controls Connector End Views

Powertrain Control Module (PCM)

On the right side of the engine compartment, rear of the wheelhouse

Power and Grounding Component Views in Wiring Systems

Powertrain Control Module Connector End Views

Second Gear Start Switch (Chevrolet w/o NW9)

In the center of the IP, above the HVAC control

Antilock Brake System Component Views in ABS Traction Control

Engine Controls Connector End Views

Stop Lamp/TCC Switch (Automatic)

Mounted on the brake pedal bracket

Cruise Control Component Views in Cruise Control

Lighting Systems Connector End Views in Lighting Systems

Throttle Actuator Control

On the plenum, with throttle body

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Engine Controls Connector End Views

Throttle Actuator Control (TAC) Module

Mounted on the accelerator pedal bracket

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Engine Controls Connector End Views

Vehicle Speed Sensor (Automatic)

On the rear right side of the transmission

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

Engine Controls Connector End Views

Vehicle Speed Sensor (Manual)

On the rear left side of the transmission

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

Engine Controls Connector End Views

Splice Pack SP200

Under the left side of the IP, near the DLC

Lighting Systems Component Views in Lighting Systems

Data Link Communications Connector End Views in Data Link Communications

C100 (10 cavities)

Engine to forward lamp harness, in the engine compartment, above the right wheelhouse

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101 (10 cavities)

Engine to forward lamp harness, in the engine compartment, above the right wheelhouse

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C105 (8 cavities)

Engine to forward lamp harness, in the engine compartment, above the right wheelhouse

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200A (17 cavities)

Forward lamp to IP harness, between the left kick panel and the steering column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200B (18 cavities)

Forward lamp to IP harness, between the left kick panel and the steering column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200D (48 cavities)

Part of the IP harness, between the left kick panel and the steering column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C220 (10 cavities)

IP to engine harness, under the right side of the IP, behind the knee bolster

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C230 (10 cavities)

IP to engine harness, under the right side of the IP, behind the knee bolster

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C250 (2 cavities)

Forward lamp harness of the cruise control harness, near the brake/clutch pedal bracket

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C270 (2 cavities)

IP harness of the cruise control harness, near the brake/clutch pedal bracket

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C405A (7 cavities)

Fuel tank harness to the IP harness pass through connector, forward of the rear axle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C405B (16 cavities)

IP harness pass through connector, forward of the rear axle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C405D (4 cavities)

Fuel tank harness to the IP harness pass through connector, forward of the rear axle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G106

Attached to the top left side of the radiator support

Harness Routing Views in Wiring Systems

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G110 (V6 VIN K)

In the front of the engine, bolted to the pulley above the A/C clutch connector

Harness Routing Views in Wiring Systems

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G112

Attached to the rear of the left cylinder head

Harness Routing Views in Wiring Systems

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G200

Near the left A-pillar, bolted to the IP mounting stud behind the kick panel

Harness Routing Views in Wiring Systems

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G305

Bolted to the left rocker panel at the floor pan bar

Harness Routing Views in Wiring Systems

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P100

Left side in the dash panel, engine to the passenger compartment

Harness Routing Views in Wiring Systems

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P110

Right side in the dash panel, engine to the passenger compartment

Harness Routing Views in Wiring Systems

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S101

In the engine harness main branch, approximately 15 cm (6 in) from the powertrain control module (PCM) breakout

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S102

In the engine harness, approximately 21 cm (8.3 in) from G211 breakout

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S104

In the engine harness, approximately 7 cm (2.3 in) from the right knock sensor breakout

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S107

In the engine harness, main branch, approximately 21 cm (8.3 in) from the powertrain control module (PCM) breakout

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S108

In the engine harness, main branch, approximately 15 cm (6 in) from G112 breakout

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S110

In the engine harness, approximately 4 cm (1.6 in) from the powertrain control module (PCM) breakout

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S111

In the forward lamp harness, approximately 14 cm (5.5 in) from the powertrain control module (PCM) breakout

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S113

In the forward lamp harness approximately 7 cm (2.8 in) from the electronic throttle control (ETC) module/cruise control module breakout

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S114

In the engine harness, approximately 3 cm (1.2 in) from the generator breakout

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S115

In the engine harness at the generator breakout

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S117

In the engine harness, approximately 3 cm (1.2 in) from fuel injector 5 breakout

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S121

In the engine harness, main branch, approximately 8 cm (3.1 in) from the powertrain control module (PCM) breakout

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S144

In the engine harness, approximately 2 cm (0.8 in) from fuel injector 3 breakout

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S145

In the engine harness, approximately 4 cm (1.6 in) from fuel injector 3 breakout

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S154 (Chevrolet)

In the forward lamp harness, approximately 7 cm (2.8 in) from the C120 (left front wheel speed sensor) breakout

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S154 (Pontiac)

In the forward lamp harness, approximately 13 cm (5.1 in) from the C120 (left front wheel speed sensor) breakout

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S165

In the forward lamp harness, approximately 7 cm (2.8 in) from the main branch into the engine wiring harness junction block 2 breakout

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S166

In the forward lamp harness, approximately 14 cm (5.5 in) from G105 breakout

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S167

In the forward lamp harness, approximately 7 cm (2.8 in) from the electronic brake control module (EBCM) breakout

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S169

In the forward lamp harness, approximately 6 cm (2.4 in) from the main branch into the engine wiring harness junction block 1 breakout

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S170

In the forward lamp harness, approximately 13 cm (5.1 in) from G106 breakout

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S171

In the forward lamp harness, approximately 10 cm (4 in) from G102 breakout

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S179

In the forward lam harness, approximately 25 cm (9.8 in) from the engine wiring harness junction block 1 breakout

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S182

In the forward lamp harness, approximately 15 cm (6 in) from the engine wiring harness junction block 1 breakout

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S206

In the IP harness, at the rear compartment lid release relay breakout

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S215

In the IP harness, main branch, approximately 11 cm (4 in) from the antenna cable breakout

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S216

In the IP harness, main branch, approximately 10 cm (4 in) from the instrument cluster breakout

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S217

In the IP harness, main branch, approximately 18 cm (6.8 in) from the body control module (BCM) breakout

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S234 (Automatic)

In the IP harness, main branch, approximately 5 cm (2 in) from the body control module (BCM) breakout

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S240

In the IP harness, main branch, approximately 17 cm (6.7 in) from the antenna cable breakout

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S242

In the IP harness, approximately 4 cm (1.6 in) from the data link connector (DLC) breakout

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S243

In the IP harness, approximately 9 cm (3.5 in) from G200 breakout

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S244 (Convertible)

In the IP harness, approximately 46 cm (18 in) from C405

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S244 (Coupe)

In the IP harness, approximately 40 cm (15.8 in) back from C405

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S248

In the IP harness, approximately 2 cm (0.8 in) from DRL module breakout

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