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

Accelerator Pedal Position Module

Below IP, attached to accelerator pedal

Engine Controls Component Views

Engine Controls Connector End Views

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

Battery Junction Block

Front right side of engine compartment, next to radiator

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Boost Pressure Sensor

Top of engine

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor

Lower left front engine, near crankshaft

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Switch

Part of multi-function lever

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

Engine Shut Off Solenoid

Top front center of engine

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Heater

Left frame rail near center of vehicle

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Lift Pump

Left frame rail near center of vehicle

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump Switch and Engine Oil Pressure Gauge Sensor

Top center on left lifter gallery

Engine Controls Component Views

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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 Solenoid Driver

Top front center of engine

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Solenoid (Part of Fuel Sol. Driver)

Top right side of engine

Engine Controls Component Views

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Glow Plug Relay

Top right side of engine at rear

Engine Controls Component Views

Engine Controls Connector End Views

Glow Plugs #1 through #8

Both sides of engine

Engine Controls Component Views

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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

Ignition Timing Stepper (ITS) Motor

Top front of engine, mounted on the injection pump

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

Top of engine, right side

Engine Controls Component Views

Engine Controls Connector End Views

Optical Fuel Temperature Sensor

Top of engine, mounted on the injection pump

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

Powertrain Control Module (PCM)

Behind center of IP

Engine Controls Component Views

Powertrain Control Module Connector End Views

Radio

Center of IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

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

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 Speed Sensor (VSS)

Left side of transmission

Engine Controls Component Views

Engine Controls Connector End Views

Vehicle Speed Sensor (VSS) Buffer

Below left side of IP, near the right side of the steering column

Engine Controls Component Views

Engine Controls Connector End Views

Wastegate Solenoid

Right top of engine

Engine Controls Component Views

Engine Controls Connector End Views

Water In Fuel Indicator Lamp

Left side of instrument cluster, part of instrument cluster

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

Water In Fuel Sensor

Left frame rail near center of vehicle, part of the fuel filter/manager assembly

Engine Controls Component Views

Engine Controls Connector End Views

C100

Left engine compartment at bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101

Engine harness, left top of engine

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103

Left on transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

C106

Engine harness, left top of engine

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C107

Engine harness, left top of engine

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C108

Engine harness, right side, near glow plug relay

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C117

Top of engine, next to fuel solenoid driver

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

Steering column harness at base of column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

IP harness behind right side of IP near center of vehicle, near C220

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C220

IP harness behind right side of IP near center of vehicle, near C213

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 side transmission cross member, near EBCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

Engine harness, under the A/C compressor, attached to the stud at the water mainfold to the left head

Power and Grounding Component Views in Wiring Systems

--

G103

Engine harness, at the oil filter pipe bracket

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

--

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 22 cm (8.7 in) from optical fuel temperature sensor breakout toward C100 breakout

--

--

S102

Engine harness, approx 4 cm (1.6 in) from main harness breakout that leads to blower motor toward C100

--

--

S105

Engine jumper harness, approx 4 cm (1.6 in) into optical fuel temperature sensor breakout

--

--

S106

Engine jumper harness, approx 4 cm (1.6 in) into crankshaft position sensor breakout

--

--

S107

Engine jumper harness, approx 4 cm (1.6 in) into engine shut off solenoid breakout

--

--

S108

Engine jumper harness, approx 2 cm (0.8 in) from optical fuel temperature sensor breakout toward engine coolant temperature (ECT) sensor breakout

--

--

S112

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

--

--

S114

IP harness, approx 15 cm (5.9 in) from C100 toward P102

--

--

S115

Engine jumper harness, approx 6 cm (2.4 in) from optical fuel temperature sensor breakout toward C107

--

--

S117

Engine harness, approx 11cm (4.3 in) into main harness breakout that leads to blower motor resistor/relay and starter solenoid breakouts

--

--

S120

Engine harness, approx 4 cm (1.6 in) into main harness breakout that leads to blower motor resistor and starter solenoid breakouts

--

--

S121

Engine harness, approx 14 cm (5.5 in) from starter solenoid breakout toward P101

--

--

S123

Engine jumper harness, approx 4 cm (1.6 in) into fuel solenoid driver breakout

--

--

S124

Engine harness, approx 15 cm (5.9 in) from C107 breakout toward C100 breakout

--

--

S130

Engine harness, approx 4 cm (1.6 in) from C101 toward electronic brake control module (EBCM)

--

--

S138

Engine harness, approx 10 cm (3.9 in) from A/T input shaft speed sensor breakout toward C100 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

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--

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

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--

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

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--

S238

IP harness, approx 4 cm (1.6 in) from C200 breakout toward DLC breakout

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--

S239

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

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