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 17 cm (6.8 in) from the A/C compressor clutch connector

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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

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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

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

Engine Coolant Temperature (ECT) Sensor

On the lower left side of the engine, above the generator

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 right side of the engine, in the oil pan

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

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 left side of the engine, mounted to the intake 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

On the left rear of the engine, mounted to the 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

Engine Controls Component Views

Engine Controls Connector End Views

Generator

On the front left side of the engine

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

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

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Heated Oxygen Sensor Bank 1, Sensor 2

At the rear of the left catalytic converter

Engine Controls Component Views

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

Heated Oxygen Sensor Bank 2, Sensor 2

At the rear of the right catalytic converter

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

Idle Air Control (IAC) Valve

On the right front of the engine, on the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Coils/Modules (Bank 1)

On the valve cover at the top of each engine cylinder, on the left side of the engine

Engine Controls Component Views

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Ignition Coils/Modules (Bank 2)

On the valve cover at the top of each engine cylinder, on the right side of the engine

Engine Controls Component Views

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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

Engine Controls Component Views

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, Front

On the center of the engine below the intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Knock Sensor, Rear

On the center of the engine below the intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Manifold Absolute Pressure (MAP) Sensor

Mounted to the right side of the intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Manual Transmission

Behind the engine

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

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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 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

Engine Controls Component Views

Powertrain Control Module Connector End Views

Radio

In the center of the IP, below the HVAC control

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Reverse Inhibit Solenoid

On the rear left side of the transmission

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

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Secondary Air Injection Bypass Valve

Mounted to the right front frame rail

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Engine Controls Connector End Views

Secondary Air Injection (AIR) Pump

On the front left frame rail, in the engine compartment

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Engine Controls Connector End Views

Skip Shift Solenoid

On the center left side of the transmission

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

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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 Position (TP) Sensor

Mounted to the front of the throttle body

Engine Controls Component Views

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

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

C106 (7 cavities)

Engine to the engine jumper harness

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C107 (7 cavities)

Engine to the engine jumper harness

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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

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

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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

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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

Attached to the rear of the left cylinder head

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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S100 (Automatic Transmission)

In the engine harness, approximately 12 cm (4.7 in) from the automatic transmission breakout

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S100 (Manual Transmission)

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

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S102

In the engine harness, main branch, approximately 7 cm (2.8  in) from the engine oil pressure sensor breakout

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S104

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

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S105

In the engine harness at the A/C refrigerant pressure sensor breakout

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S106

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

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S107

In the engine harness, main branch, approximately 7 cm (2.8 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 (4.7 in) from the vehicle speed sensor breakout

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S109

In the engine harness, approximately 8 cm (3.2 in) from the fuel injector 4 breakout

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S110

In the engine harness, main branch, approximately 20 cm (7.9 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 17 cm (6.7 in) back from the A/C compressor clutch breakout

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S115

In the engine harness, approximately 20 cm (7.9 in) back from the A/C compressor clutch breakout

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S116

In the engine harness, approximately 9 cm (3.5 in) from the manifold absolute pressure (MAP) sensor breakout

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S118

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

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S119 (Automatic Transmission)

In the engine harness, main branch, approximately 8 cm (3.1 in) from the automatic transmission breakout

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S119 (Manual Transmission)

In the engine harness, main branch, approximately 9 cm (3.5 in) from the vehicle speed sensor breakout

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S122

In the engine jumper harness

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S123

In the engine jumper harness

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S124

In the engine jumper harness

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S125

In the engine jumper harness

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S126

In the engine jumper harness

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S127

In the engine jumper harness

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S128

In the engine harness, approximately 4 cm (1.8 in) from the manifold absolute pressure (MAP) 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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S177

In the forward lamp harness, approximately 5 cm (2 in) from the engine wiring harness junction block 1 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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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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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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