GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Enable Relay

Underhood fuse-relay center, left front of engine compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

A/C Compressor High Pressure Cutoff Switch

On rear portion of A/C compressor

HVAC Component Views in HVAC Systems with A/C Manual

HVAC Connector End Views in HVAC Systems with A/C Manual

A/C Compressor Low Pressure Cutout Switch

In low pressure refrigerant line

HVAC Component Views in HVAC with A/C Manual

HVAC Connector End Views in HVAC Systems with A/C Manual

Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Internal to transmisson

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Automatic Transmission Input Shaft Speed (A/T ISS) Sensor

Left side of transmission

Automatic Transmission Electronic Component Views in Automatic Transmission 4L80-E

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Camshaft Position (CMP) Sensor

Part of distributor, rear top of engine

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor

Lower front engine, near crankshaft

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Module

Front of engine compartment, near left fender

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Under left side of IP

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Electronic Brake Control Module (EBCM)

Left frame rail near center of vehicle

Antilock Brake System Component Views in Antilock Brakes

Antilock Brake System Connector End Views in Antilock Brakes

Engine Coolant Temperature (ECT) Sensor

Left side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emission (EVAP) Canister Purge Valve

Right side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emission (EVAP) Canister Vent Valve

Right side of engine

Engine Controls Component Views

Engine Controls Connector End Views

EVO/Passlock Module

Below center of IP

Theft Deterrent System Component Views in Theft Deterrent

Theft Deterrent System Connector End Views in Theft Deterrent

Exhaust Gas Recirculation (EGR) Valve

Top front of engine

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injectors #1 through #6

Engine harness, in line to engine fuel injectors, top of intake manifold

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump Switch and Engine Oil Pressure Gauge Sensor

Top rear of engine

Engine Controls Component Views

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Fuel Pump (FP) and Sender 35 GAL

In fuel tank, under rear of vehicle

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump (FP) and Sender 55 GAL

In fuel tank, under rear of vehicle

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump Relay

In underhood fuse- relay center, left front of engine compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Fuel Tank Pressure Sensor

In fuel tank, under rear of vehicle

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor, Bank 1 Sensor 1

In exhaust pipe, in front of catalytic converter

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor, Bank 1 Sensor 3

In exhaust pipe, in back of catalytic converter

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor, Bank 2 Sensor 1

In exhaust pipe in front of catalytic converter

Engine Controls Component Views

Engine Controls Connector End Views

Heater and A/C Controller

Center Of IP

Heater Blower Controls Component Views in HVAC Systems Non-A/C

Heater Blower Controls Connector End Views in HVAC Systems Non-A/C

IP Fuse Block

At left lower kick panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Idle Air Control Valve

Top left side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control Module

Top right side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Coil

Top right of engine.

Engine Controls Component Views

Engine Controls Connector End Views

Instrument Cluster

Left side of 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

Part of air intake duct, front of engine compartment

Engine Controls Component Views

Engine Controls Connector End Views

Knock Sensor

Top rear of engine

Engine Controls Component Views

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Manifold Absolute Pressure (MAP) Sensor

Top right side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow (MAF) Sensor

Part of air intake duct, front top of engine

Engine Controls Component Views

Engine Controls Connector End Views

Pressure Control Solenoid (PC SOL) Valve

Internal to transmisson

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Radio

Center of IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

TCC/Stoplamp Switch

Below center of IP, near brake pedal lever

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Throttle Position (TP) Sensor

Left top of engine

Engine Controls Component Views

Engine Controls Connector End Views

Torque Convertor Clutch Solenoid (TCC SOL) Valve

Internal to transmisson

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Torque Convertor Clutch Pulse Width Modulation Solenoid(TCC PWM SOL) Valve

Internal to transmisson

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Transmission Fluid Temperature (TFT) Sensor

Internal to transmisson

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Underhood Fuse --Relay Center

Engine compartment, left fender

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM)

Engine compartment, left fender

Engine Controls Component Views

VCM Connector End Views

Vehicle Speed Sensor (VSS)

Below left side of IP, near steering column

Engine Controls Component Views

Engine Controls Connector End Views

C100

Left rear of engine compartment at bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103 (4L60-E)

Left on transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

C103 (4L80-E)

Left on transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

C105

Engine harness, right frame rail near starter

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C110

Engine harness, in line to engine sensors

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

IP harness behind center of IP near center of vehicle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C301

Engine harness, in line to fuel pump harness on left frame rail near EBCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G100

Left engine compartment, near fender well

Power and Grounding Component Views in Wiring Systems

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G201

IP harness behind left kick panel near IP fuse block

Power and Grounding Component Views in Wiring Systems

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G103

Engine harness, at generator bracket

Power and Grounding Component Views in Wiring Systems

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P100

Left rear of engine compartment at bulkhead

Harness Routing Views in Wiring Systems

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P101

Under right side of IP

Harness Routing Views in Wiring Systems

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S101

Engine harness, approx 20 cm (7.9 in) from knock sensor breakout toward EBCM

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--

S102

Engine harness, approx 104 cm (40.9 in) from underhood fuse-relay center toward A/C compressor breakout

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--

S103

Engine harness, approx 4 cm (1.6 in) from fuel injector breakout toward transmission

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--

S120

Engine harness, approx 19 cm (7.5 in) from C100 breakout toward EGR sensor breakout

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--

S122

Engine harness, approx 7 cm (2.8 in) from G103 breakout toward transmission

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--

S130

Engine harness, approx 117 cm (46.1 in) from the underhood fuse-relay center toward A/C compressor breakout

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--

S132

Engine harness, approx 4 cm (1.6 in) from fuel injector harness breakout toward heated oxygen sensor (bank 2 sensor 1) breakout

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S133

Engine harness, approx 8 cm (3.1 in) from fuel injector harness breakout toward knock sensor breakout

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S136

Engine harness, approx 11 cm (4.3 in) from the underhood fuse-relay center toward A/C compressor breakout

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S137

Engine harness approx 92 cm (35.8 in) from the underhood fuse-relay center toward A/C compressor breakout

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--

S138

Engine harness, approx 12 cm (4.7 in) from fuel injector breakout toward transmission

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--

S139

Engine harness, approx 85 cm (33.5 in) from the underhood fuse-relay center toward A/C compressor breakout

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--

S152

Engine harness 16 cm (6.3 in) from fuel injector breakout toward G103 breakout

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--

S153

Engine harness 4 cm (1.6 in) from A/C compressor breakout toward transmission

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S154

Engine harness approx 98 cm (38.6 in) from the underhood fuse-relay center toward A/C compressor breakout

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S201

IP harness, approx 4 cm (1.6 in) from park brake warning switch breakout toward data link connector breakout

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--

S202

IP harness, approx 7 cm (2.8 in) into VSSB breakout

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--

S207

IP harness, approx 4 cm (1.6 in) into VSSB breakout

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--

S210

IP harness, approx 4 cm (1.6 in) into TCC/Stoplamp switch breakout

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--

S215

IP harness, approx 4 cm (1.6 in) from radio breakout toward power antenna assembly breakout

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S216

IP harness, approx 8 cm (3.1 in) from C200 breakout toward instrument cluster breakout

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S218

IP harness, approx 7 cm (2.8 in) from instrument cluster breakout toward HVAC switch breakout

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S239

IP harness, approx 10 cm (3.9 in) into radio breakout

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S301

O2S jumper harness, approx 15 cm (5.9 in) from C105 breakout toward O2S pigtail connector

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S304

O2S jumper harness, approx 22 cm (8.7 in) from C105 breakout toward O2S pigtail connector

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