GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch

Front 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 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 Systems 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 transmission

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 (4L80 E)

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

Top front 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 #8

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 left center 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 left center 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 2 Sensor 2

In exhaust pipe, in rear 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

Heated Oxygen Sensor, Bank 2 Sensor 2

In exhaust pipe, in back 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 (IAC) 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

Right side of the engine block

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 transmission

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

Shift Solenoid 1-2, 2-3, and 3-2 for the 4L60-E

Internal to transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Shift Solenoid 1-2, 2-3, for the 4L80-E

Internal to transmission

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

Automatic Transmission Internal Connector End Views in Automatic Transmission 4L80-E

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 transmission

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 transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Transmission Fluid Temperature (TFT) Sensor

Part of Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch. Internal to transmission

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) (4L60-E)

Right side of transmission

Engine Controls Component Views

Engine Controls Connector End Views

Vehicle Speed Sensor (VSS) (4L80-E)

Left side of transmission

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 at the middle of the vehicle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C110

Engine harness, in line to engine sensors, front right side

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

IP harness behind left side 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 and the evap canister

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

Engine harness, near thermostat housing

Power and Grounding Component Views in Wiring Systems

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G103

Rear of the right cylinder head

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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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 10 cm (3.9 in) from ignition coil breakout toward fuel injector breakout

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--

S102

Engine harness, approx 4 cm (1.6 in) from A/C compressor breakout toward MAF sensor breakout

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S103

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

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--

S112

IP harness, approx 40 cm (15.7 in) from C100 toward P102

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--

S120

Engine harness, approx 4 cm (1.6 in) from C100 breakout toward ECT sensor breakout

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--

S122

Engine harness 24 cm (9.4 in) from A/C compressor breakout toward C100

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--

S130

Engine harness, approx 12 cm (4.7 in) from heated right oxygen sensors breakout toward fuel injector breakout

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--

S131

Engine harness, approx 24 cm (9.4 in) from C100 toward engine

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--

S132

Engine harness, approx 8 cm (3.1 in) into fuel injector harness breakout

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--

S133

Engine harness, approx 15 cm (5.9 in) into fuel injector harness breakout

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--

S136

Engine harness, approx 8 cm (3.1 in) from right HO2 sensor breakout toward fuel injector breakout

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--

S137

Engine harness approx 17 cm (6.7 in) from A/C compressor breakout toward C100

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--

S138

Engine harness, approx 3 cm (1.2 in) from fuel injector harness breakout toward heated oxygen sensors breakout

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--

S139

Engine harness, approx 4 cm (1.6 in) from A/C compressor breakout toward underhood fuse-relay center

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--

S152

Engine harness 4 cm (1.6 in) from fuel injector breakout toward G103 breakout

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--

S153

Engine harness 8 cm (3.1 in) from ignition coil breakout toward transmission

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--

S154

Engine harness 4 cm (1.6 in) from ignition coil breakout toward transmission

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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 cm) 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 (5.0L)

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

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--

S301 (5.7L)

O2S jumper harness, approx 28 cm (11 in) from C105 breakout toward O2S pigtail connector

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--

S304 (5.0L)

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

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S304 (5.7L)

O2S jumper harness, approx 35 cm (13.8 in) from C105 breakout toward O2S pigtail connector

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