GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

1st-2nd Shift Valve Solenoid

Inside the automatic transmission

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2nd-3rd Shift Valve Solenoid

Inside the automatic transmission

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3rd-2nd Shift Valve Solenoid

Inside the automatic transmission

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A/C Compressor Clutch

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

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Engine Controls Connector End Views

A/C Compressor Clutch Diode

Sealed in the engine harness, approximately 17.0 cm (7.0 in) back from the A/C compressor clutch connector

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A/C Refrigerant Pressure Sensor

Above right front wheelhouse, attached to the refrigerant line

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Engine Controls Connector End Views

Automatic Transmission

Behind the engine

Automatic Transmission Electronic Component Views

Automatic Transmission Inline Harness Connector End View

Body Control Module (BCM)

Under the right side of the instrument panel near the blower motor

Body Control System Component Views

Body Control System Connector End Views

Camshaft Position (CMP) Sensor

Mounted in engine front cover

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position Sensor

Lower front of engine

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Module

Mounted to the left frame rail, forward of the wheelhouse

Cruise Control Component Views

Cruise Control Connector End Views

Data Link Connector (DLC)

Under the instrument panel, right of the steering column

Instrument Panel, Gages, and Console Component Views

Power and Grounding Connector End Views

Electronic Brake Control Module (EBCM)

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

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Antilock Brake System Connector End Views

Engine Coolant Temperature (ECT) Sensor

Lower left side of engine, above generator

Engine Controls Component Views

Engine Controls Connector End Views

Engine Cooling Fans

Behind the radiator

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Engine Oil Level Switch

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

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Pressure Sensor

On the top rear of the engine, near the left cylinder head

Harness Routing Views

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Evaporative Emission (EVAP) Canister Purge Solenoid Valve

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

Engine Controls Component Views

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

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve (V8 VIN G)

Left rear of engine, mounted to intake manifold

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

Heated Oxygen Sensor Bank 1, Sensor 1 (Left Front)

Mounted in the left exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor Bank 1, Sensor 2 (Left Rear)

At the rear of the left catalytic converter

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor Bank 2, Sensor 1 (Right Front)

Mounted in the right exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor Bank 2, Sensor 2 (Right Rear)

At the rear of the right catalytic converter

Engine Controls Component Views

Engine Controls Connector End Views

HVAC Control

In the center of the instrument panel, above the radio

HVAC Component Views

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Idle Air Control (IAC) Valve

Right front on throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control Coils/Modules

On the valve cover at the top of each cylinder

Engine Controls Component Views

Engine Controls Connector End Views

Instrument Cluster

On the left side of the instrument panel

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Intake Air Temperature (IAT) Sensor

Mounted on air duct, in front of intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

IP Fuse Block

On the left end of the instrument panel carrier

Instrument Panel, Gages, and Console Component Views

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Knock Sensor, Front

Center of the engine below the intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Knock Sensor, Rear

Center of the engine below the intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Manifold Absolute Pressure (MAP) Sensor

Mounted to right side of 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

Engine Controls Component Views

Engine Controls Connector End Views

Park Neutral Position Switch

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

Tilt Wheel/Column Component Views

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Powertrain Control Module (PCM)

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

Engine Controls Component Views

Powertrain Control Module Connector End Views

Radio

In the center of the instrument panel, below the HVAC control

Instrument Panel, Gages, and Console Component Views

Entertainment Connector End Views

Reverse Lockout Solenoid (Manual)

On the rear left side of the transmission

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Powertrain Control Module Connector End Views

Secondary Air Injection Bleed Valve Solenoid

Mounted to the right front frame rail

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection Pump

On the front left frame rail, in the engine compartment

Engine Controls Component Views

Engine Controls Connector End Views

Skip Shift Solenoid (Manual)

On the center left side of the transmission

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Engine Controls Connector End Views

Stop Lamp Switch

Mounted on the brake pedal bracket

Cruise Control Component Views

Antilock Brake System Connector End Views

Throttle Position (TP) Sensor

Mounted to the front of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Underhood Electrical Center 1

On the Left front corner of the engine compartment

Power and Grounding Component Views

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Underhood Electrical Center 2

On the left front corner of the engine compartment

Power and Grounding Component Views

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Vehicle Speed Sensor (Manual)

Rear left side of transmission

Power and Grounding Component Views

Engine Controls Connector End Views

Vehicle Speed Sensor (Automatic)

Rear right side of transmission

Power and Grounding Component Views

Engine Controls Connector End Views

C100 (10 cavities)

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

Harness Routing Views

Inline Harness Connector End Views

C101 (10 cavities)

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

Harness Routing Views

Inline Harness Connector End Views

C102 (1 cavity)

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

Harness Routing Views

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C105 (8 cavities)

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

Harness Routing Views

Inline Harness Connector End Views

C106 (7 cavities)

Engine to engine jumper harness

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C107 (7 cavities)

Engine to engine jumper harness

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C108 (3 cavities)

Engine to camshaft position sensor jumper harness

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Inline Harness Connector End Views

C200A (17 cavities)

Forward lamp to instrument panel harness, behind the left kick panel and steering column

Harness Routing Views

Inline Harness Connector End Views

C200B (18 cavities)

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

Harness Routing Views

Inline Harness Connector End Views

C200D (48 cavities)

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

Harness Routing Views

Inline Harness Connector End Views

C210 (8 cavities)

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

Harness Routing Views

Inline Harness Connector End Views

C220 (10 cavities)

Instrument panel to engine harness, under the right side of the instrument panel, behind the knee bolster

Harness Routing Views

Inline Harness Connector End Views

C230 (10 cavities)

Instrument panel to engine harness, under the right side of the instrument panel, behind the knee bolster

Harness Routing Views

Inline Harness Connector End Views

C405A (7 cavities)

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

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Inline Harness Connector End Views

C405B (16 cavities)

Instrument panel harness pass through connector, forward of the rear axle

Harness Routing Views

Inline Harness Connector End Views

G100 (V6 VIN K)

On the lower right side of the engine, above the A/C compressor

Harness Routing Views

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G100 (V8 VIN G)

On the lower right side of the engine, above the starter solenoid

Harness Routing Views

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G106

Attached to the top left side of the radiator support

Harness Routing Views

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G110

Attached to the rear of the left cylinder head

Harness Routing Views

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G112

Attached to the rear of the left cylinder head

Harness Routing Views

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G200

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

Harness Routing Views

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G305

Bolted to the left rocker panel at the floor pan bar 3

Harness Routing Views

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P100

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

Harness Routing Views

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P110

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

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S100 (Manual Transmission)

Engine harness, approximately 5 cm (2 in) from the vehicle speed sensor breakout

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S100 (Automatic Transmission)

Engine harness, approximately 12 cm (5 in) from the automatic transmission breakout

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S102

In the engine harness, main branch, approximately 7 cm (3 in) from the engine oil pressure sensor breakout

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S104

Engine harness, approximately 14 cm (6 in) from the powertrain control module (PCM) breakout

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S105

Engine harness at A/C refrigerant pressure sensor breakout

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S106

In the engine harness, main branch approximately 4 cm (2 in) from the powertrain control module (PCM) breakout

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S107

In the engine harness, main branch, approximately 7 cm (3 in) from the powertrain control module (PCM) breakout

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S108 (Automatic Transmission)

In the engine harness, main branch, approximately 5 cm (2 in) from the automatic transmission breakout

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S108 (Manual Transmission)

In the engine harness, main branch, approximately 12 cm (5 in) from the vehicle speed sensor breakout

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S109

In the engine harness, approximately 8 cm (3 in) from the fuel injector 4 breakout

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S110

In the engine harness, main branch, approximately 19 cm (7 in) from the powertrain control module (PCM) breakout

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S113

In the forward lamp harness approximately 7 cm (3 in) from the engine coolant fans/cruise control

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S114

Engine harness, approximately 17 cm (7 in) back from A/C compressor clutch connector

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S115

In the engine harness, approximately 20 cm (8 in) back from the A/C compressor clutch connector

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S116

Engine harness, approximately 9 cm (4 in) from manifold absolute pressure (MAP) sensor breakout

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S118

Engine harness, approximately 15 cm (6 in) from manifold absolute pressure (MAP) sensor breakout

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S119 (Automatic Transmission)

Engine harness, main branch, approximately 8 cm (3 in) from automatic transmission breakout

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S119 (Manual Transmission)

Engine harness, main branch, approximately 9 cm (4 in) from vehicle speed sensor breakout

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S120

Engine harness, main branch, 8 cm (3 in) from powertrain control module (PCM) breakout

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S122

Engine jumper harness

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S123

Engine jumper harness

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S124

Engine jumper harness

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S125

Engine jumper harness

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S126

Engine jumper harness

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S127

Engine jumper harness

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S159

Forward lamp harness, approximately 8 cm (3 in) into secondary air injection bleed valve solenoid breakout

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S165

In the forward lamp harness, approximately 7 cm (3 in) from the main branch into the UH electrical center 2 breakout

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S166

Forward lamp harness, approximately 14 cm (6 in) from G105 breakout

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S167

Forward lamp harness, approximately 7 cm (3 in) from electronic brake control module (EBCM) breakout

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S169

In the forward lamp harness, approximately 6 cm (2 in) from the main branch into the UH electrical center 1 breakout

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S177

In the forward lamp harness, approximately 4 cm (2 in) from the main branch into the UH electrical center 1 breakout

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S179

In the forward lamp harness, approximately 25 cm (10 in) from the UH electrical center 1 breakout

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S182

In the forward lamp harness, approximately 15 cm (6 in) from the UH electrical center 1 breakout

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S184

In the forward lamp harness, approximately 5 cm (2 in) from the UH electrical center 1 breakout

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S215

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

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S217

In the instrument panel harness, main branch, approximately 18 cm (7 in) from the body control module (BCM) breakout

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S225

Instrument panel harness, approximately 6 cm (2 in) from blower motor breakout

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S234 (Automatic)

Instrument panel harness, main branch, approximately 5 cm (2 in) from body control module (BCM) breakout

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S240

In the instrument panel harness, main branch, approximately 17 cm (7 in) from the antenna cable breakout

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S242

In the instrument panel harness, main branch, approximately 4 cm (2 in) from data link connector (DLC) breakout

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S244 (Convertible)

Instrument panel harness, approximately 46 cm (18 in) from C405

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S244 (Coupe)

Instrument panel harness, approximately 40 cm (16 in) back from C405

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