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 - Manual

HVAC Connector End Views in HVAC Systems - Manual

A/C Compressor Enable Relay

Underhood fuse-relay center, LH 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 - Manual

HVAC Connector End Views in HVAC Systems - Manual

A/C Compressor Low Pressure Cutout Switch

In low pressure refrigerant line

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Internal to transmission

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

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

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

LH side of transmission

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

Automatic Transmission Inline Harness Connector End View in Automatic Transmission 4L80-E

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 LH fender

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Under LH side of IP

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Electronic Brake Control Module (EBCM)

LH frame rail near center of vehicle

Antilock Brake System Component Views in ABS

Antilock Brake System Connector End Views in ABS

Engine Coolant Temperature (ECT) Sensor

Top front of engine

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emission (EVAP) Canister Purge Valve

RH side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emission (EVAP) Vent Valve

RH side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

RH side of engine

Engine Controls Component Views

Engine Controls Connector End Views

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, LH 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

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

HVAC Component Views in HVAC Systems Non-A/C

HVAC Connector End Views in HVAC Systems Non-A/C

IP Fuse Block

At the LH 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 LH side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control Module

Top RH side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Coil

Top RH of engine.

Engine Controls Component Views

Engine Controls Connector End Views

Instrument Cluster

LH 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, LH

LH side of engine

Engine Controls Component Views

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Knock Sensor, RH

RH side of engine

Engine Controls Component Views

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Manifold Absolute Pressure (MAP) Sensor

Top RH 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

Passlock Module

Below center of IP

Theft Deterrent System Component Views in Theft Deterrent

Theft Deterrent System Connector End Views in Theft Deterrent

Pressure Control Solenoid (PC SOL) Valve

Internal to transmission

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

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

Radio

Center of IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Secondary Air Injection Reaction (AIR) Pump Clutch

RH lower front of engine

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection Reaction (AIR) Pump Relay

Underhood fuse-relay center, LH front of engine compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

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

RH top of engine

Engine Controls Component Views

Engine Controls Connector End Views

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

Internal to transmission

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

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

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 4L80-E

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

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, LH fender

Engine Controls Component Views

VCM Connector End Views

Vehicle Speed Sensor (VSS)

LH side of transmission

Engine Controls Component Views

Engine Controls Connector End Views

C100

LH rear of engine compartment at bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103 (4L80-E)

LH on transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission 4L80-E

C105

Engine harness, RH 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

C112

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

IP harness behind LH 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 LH frame rail near EBCM

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

--

G105

RH lower front of engine

Power and Grounding Component Views in Wiring Systems

--

G103

LH front of Engine harness A/C compressor

Power and Grounding Component Views in Wiring Systems

--

G201

IP harness behind LH kick panel near IP fuse block

Power and Grounding Component Views in Wiring Systems

--

P100

LH rear of engine compartment at bulkhead

Harness Routing Views in Wiring Systems

--

P101

Under RH side of IP

Harness Routing Views in Wiring Systems

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S101

Engine harness, approximately 14 cm (6 in) from fuel injector breakout toward G102 breakout

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--

S102

Engine harness, approximately 5 cm (2 in) from A/C compressor clutch breakout toward C100 breakout

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--

S103

Engine harness, approximately 8 cm (3 in) from ECT sensor breakout toward G101 breakout

--

--

S120

Engine harness, approximately 15 cm (6 in) from C100 breakout into VCM breakout

--

--

S122

Engine harness, approximately 8 cm (3 in) from C100 breakout into VCM breakout

--

--

S130

Engine harness, approximately 5 cm (2 in) from heated oxygen sensor (bank 2 sensor 1) breakout toward ignition coil breakout

--

--

S131

Engine harness, approximately 6 cm (2 in) from G101 breakout toward G103 breakout

--

--

S132

Engine harness, approximately 4 cm (2 in) from EGR valve breakout toward knock sensor breakout

--

--

S136

Engine harness, approximately 7 cm (3 in) from engine coolant temperature sensor breakout toward EGR valve breakout

--

--

S137

Engine harness, approximately 14 cm (6 in) from A/C compressor clutch breakout toward C100 breakout

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--

S139

Engine harness, approximately 21 cm (8 in) from A/C compressor clutch breakout toward C100 breakout

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--

S140

Fuel injector harness, approximately 10 cm (4 in) from C112 toward fuel injector connector

--

--

S141

Fuel injector harness, approximately 13 cm (5 in) from C112 toward fuel injector connector

--

--

S147

Engine harness, approximately 5 cm (2 in) from MAP sensor breakout toward ignition coil breakout

--

--

S152

Engine harness, approximately 15 cm (6 in) from oxygen sensor (bank 2 sensor 1) breakout toward P101

--

--

S153

Engine harness, approximately 42 cm (17 in) from underhood fuse block toward A/C compressor clutch breakout

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--

S154

Engine harness, approximately 4 cm (2 in) from ECT sensor breakout toward MAF sensor breakout

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--

S201

IP harness, approximately 4 cm (2 in) from park brake warning switch breakout toward data link connector breakout

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--

S202

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

--

--

S207

IP harness, approximately 6 cm (2 in) from park brake warning switch breakout toward data link connector breakout

--

--

S210

IP harness, approximately 4 cm (2 in) into TCC/Stoplamp switch breakout

--

--

S215

IP harness, approximately 4 cm (2 in) from radio breakout toward power antenna assembly breakout

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--

S216

IP harness, approximately 8 cm (3 in) from C200 breakout toward instrument cluster breakout

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--

S218

IP harness, approximately 7 cm (3 in) from instrument cluster breakout toward HVAC switch breakout

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--

S239

IP harness, approximately 10 cm (4 in) into radio breakout

--

--

S254

IP harness, approximately 5 cm (2 in) into the data link connector breakout

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--

S301

HO2S jumper harness, approximately 47 cm (19 in) from C105 breakout toward HO2S pigtail connector

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--

S304

HO2S jumper harness, approximately 66 cm (26 in) from C105 breakout toward HO2S pigtail connector

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