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

Left side of transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

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 Body and Accessories

Cruise Control Connector End Views in Body and Accessories

Data Link Connector (DLC)

Under left side of IP

Data Link Communications Component Views in Body and Accessories

Data Link Communications Connector End Views in Body and Accessories

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

Left side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emission (EVAP) Vent Valve (California only)

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

Left side 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

--

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

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 right side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control Module

Top rear side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Coil

Top rear 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 Body and Accessories

Instrument Panel, Gages, and Console Connector End Views in Body and Accessories

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

Left side of engine

Engine Controls Component Views

--

Knock Sensor, RH

Right side of engine

Engine Controls Component Views

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Manifold Absolute Pressure (MAP) Sensor

Top center 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 Body and Accessories

Entertainment Connector End Views in Body and Accessories

Secondary Air Injection Reaction (AIR) Pump Clutch (California only)

Right lower front of engine

Engine Controls Component Views

Engine Controls Connector End Views

Secondary Air Injection Reaction (AIR) Pump Relay (California only)

Underhood fuse-relay center, left front of engine compartment

Engine Controls Component Views

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

Automatic Transmission Internal Connector End Views in Automatic Transmission

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

Right 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

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)

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 (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

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 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

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

Right lower front of engine

Power and Grounding Component Views in Wiring Systems

--

G201

IP harness behind left kick panel near IP fuse block

Power and Grounding Component Views in Wiring Systems

--

G103

Left front of Engine harness near A/C compressor

Power and Grounding Component Views in Wiring Systems

--

P100

Left rear of engine compartment at bulkhead

Harness Routing Views in Wiring Systems

--

P101

Under right side of IP

Harness Routing Views in Wiring Systems

--

S101

Engine harness, approx 5 cm (2 in) from generator breakout toward C107 breakout

--

--

S102

Engine harness, approx 4 cm (1.6 in) from engine harness that leads to the A/C compressor breakout

--

--

S103

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

--

--

S112

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

--

--

S120

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

--

--

S122

Engine harness, approx 8 cm (3.1 in) from C100 breakout toward VCM

--

--

S130

Engine harness, approx 5 cm (2 in) from CKP sensor breakout toward MAF sensor breakout

--

--

S131

Engine harness, approx 6 cm (2.7 in) from MAP sensor breakout toward ECT sensor breakout

--

--

S132

Engine harness, appox 4 cm (1.6 in) from EGR valve breakout toward knock sensor breakout

--

--

S136

Engine harness, approx 7 cm (2.8 in) from engine coolant temperature sensor toward EGR valve breakout

--

--

S137

Engine harness, approx 14 cm (5.5 in) from MAF sensor breakout toward C100 breakout

--

--

S138

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

--

--

S139

Engine harness, approx 21 cm (8.3 in) from MAF sensor breakout toward C100 breakout

--

--

S140

Fuel injector harness, approx 10 cm (3.9 in) from C112 toward fuel injector connector

--

--

S147

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

--

--

S152

Engine harness, approx 5 cm (2 in) from oxygen sensor breakout toward P101

--

--

S153

Engine harness, approx 4 cm (1.6 in) form C100 breakout EGR sensor breakout

--

--

S154

Engine harness, approx 3 cm (1.2 in) from MAF sensor breakout toward ECT sensor breakout

--

--

S201

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

--

--

S202

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

--

--

S207

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

--

--

S210

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

--

--

S215

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

--

--

S216

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

--

--

S218

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

--

--

S239

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

--

--

S301

O2S jumper harness, approx 47 cm (18.5 in) from C105 breakout toward O2S pigtail connector

--

--

S304

O2S jumper harness, approx 66 cm (26 in) from C105 breakout toward O2S

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