GM Service Manual Online
For 1990-2009 cars only

4.3L Engine Controls Component Location Table

Name

Location

Locator View

Connector End View

Group No.

A/C Compressor Clutch

front of A/C compressor

Harness Routing Views

HVAC Connector End Views

9.186

A/C Compressor Clutch Diode (D101)

Underhood fuse-relay center

Electrical Center Identification Views

--

9.186

A/C Enable Relay

Underhood fuse-relay center

Electrical Center Identification Views

--

9.227

A/C High Pressure Cut-Off Switch

Rear of A/C compressor

Harness Routing Views

HVAC Connector End Views

9.172

A/C Low Pressure Cut-Off Switch

Top of A/C receiver dryer

Harness Routing Views

HVAC Connector End Views

9.275

Auto Transmission (2WD)

Behind engine

Harness Routing Views

Automatic Transmission Inline Harness Connector End View

4.003

Auto Transmission (AWD)

Behind engine

Harness Routing Views

Automatic Transmission Inline Harness Connector End View

4.003

Bank #1 Heated Oxygen Sensor (HO2S) #1

Left front exhaust Y-pipe

Engine Controls Component Views

Engine Controls Connector End Views

3.682

Bank #1 Heated Oxygen Sensor (HO2S) #3

Exhaust Y-pipe, between catalytic converter and muffler

Engine Controls Component Views

Engine Controls Connector End Views

3.682

Bank #2 Heated Oxygen Sensor (HO2S) #1

Right front exhaust Y-pipe closest to exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

3.682

Camshaft Position (CMP) Sensor

Side of distributor

Engine Controls Component Views

Engine Controls Connector End Views

2.383

Compass and Temperature Display Module

Front of overhead console towards front of vehicle

Driver Information System Components Views

Driver Information Systems Connector End Views

Convenience Center

Left of I/P fuse block, by left kick panel

Harness Routing Views

Electrical Center Identification Views

Crankshaft Position (CKP) Sensor

Behind and to the right of engine crankshaft pulley

Engine Controls Component Views

Engine Controls Connector End Views

2.383

Cruise Control Module

Center front of dash. left of windshield wiper module

HVAC Component Views

Cruise Control Connector End Views

3.887

Data Link Connector (DLC)

Left side of dash

Data Link Communications Component Views

Data Link Communications Connector End Views

--

Distributor

To rear of engine

Harness Routing Views

--

2.383

Distributor Ignition Control Module

Top of engine front of coil

Engine Controls Component Views

Engine Controls Connector End Views

2.838

Electronic Brake Control Module (EBCM)

Left front side of frame, left of transmission

Antilock Brake System Component Views

Antilock Brake System Connector End Views

4.730

Engine Coolant Temperature (ECT) Sensor

Side of linear EGR valve solenoid

Engine Controls Component Views

Engine Controls Connector End Views

1.150

Evaporative Emission (EVAP) Canister Purge Solenoid Valve

Top of engine, next to map sensor

Engine Controls Component Views

Engine Controls Connector End Views

3.130

Evaporative Emission (EVAP) Canister Vent Valve

Undercarriage, left of the canister purge canister

Engine Controls Component Views

Engine Controls Connector End Views

3.130

Fuel Injector #1

Top LH front of engine, under manifold cover

Harness Routing Views

Engine Controls Connector End Views

3.300

Fuel Injector #2

Top RH front of engine, under manifold cover

Harness Routing Views

Engine Controls Connector End Views

3.300

Fuel Injector #3

Top LH front of engine, under manifold cover

Harness Routing Views

Engine Controls Connector End Views

3.300

Fuel Injector #4

Top RH front of engine, under manifold cover

Harness Routing Views

Engine Controls Connector End Views

3.300

Fuel Injector #5

Top LH front of engine, under manifold cover

Harness Routing Views

Engine Controls Connector End Views

3.300

Fuel Injector #6

Top RH front of engine, under manifold cover

Harness Routing Views

Engine Controls Connector End Views

3.300

Fuel Pump and Sender

Inside fuel tank

--

Engine Controls Connector End Views

3.107

Fuel Pump Relay

Underhood fuse-relay center

Electrical Center Identification Views

--

3.900

HVAC Control Module

Center of dash

HVAC Component Views

HVAC Connector End Views

--

Idle Air Control (IAC) Valve

Top of engine, left rear of throttle body

Engine Controls Component Views

-

3.820

Ignition Coil

Top of engine, behind generator

Engine Controls Component Views

Engine Controls Connector End Views

2.383

Instrument Cluster

Left side of dash

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

9.735

Intake Air Temperature (IAT) Sensor

Top of air intake duct

Engine Controls Component Views

Engine Controls Connector End Views

3.682

I/P Fuse Block

Lower left side of dash, next to LH kick panel

Harness Routing Views

Electrical Center Identification Views

2.483

Knock Sensor

Left rear of distributor on engine block

Engine Controls Component Views

--

2.383

Linear EGR Valve Solenoid

Top of engine, left of generator

Engine Controls Component Views

Engine Controls Connector End Views

3.670

Manifold Absolute Pressure (MAP) Sensor

Top of engine, near ignition coil

Engine Controls Component Views

Engine Controls Connector End Views

3.682

Mass Airflow (MAF) Sensor

Front of air intake duct

Engine Controls Component Views

Engine Controls Connector End Views

3.682

Oil Pressure Switch and Sender

Rear of engine, left of distributor

Harness Routing Views

Engine Controls Connector End Views

--

Overhead Console

Front center of headliner

Driver Information System Components Views

Instrument Panel, Gages, and Console Connector End Views

--

Passlock/Electronic Variable Orifice (EVO) Module

Right side of instrument cluster, behind air duct

SIR Component Views

Theft Deterrent System Connector End Views

--

Radio

Center of dash

HVAC Component Views

Entertainment Connector End Views

21.480

TCC/Stoplamp Switch Assembly

Above brake pedal

--

Lighting Systems Connector End Views

2.447

Throttle Position (TP) Sensor

Top of engine, left side of throttle body

Engine Controls Component Views

Engine Controls Connector End Views

3.682

Underhood Fuse-Relay Center (2WD)

Left side front of dash, near battery

Harness Routing Views

Electrical Center Identification Views

--

Underhood Fuse-Relay Center (AWD)

Left side front of dash, near battery

Harness Routing Views

Electrical Center Identification Views

--

Vehicle Control Module (VCM)

Left side of engine compartment, side of battery

Engine Controls Component Views

VCM Connector End Views

3.670

Vehicle Speed Sensor (VSS) (2WD)

Rear of transmission

Engine Controls Component Views

--

4.710

Vehicle Speed Sensor (VSS) (AWD)

Rear of transmission

Engine Controls Component Views

--

4.710

C100

LH side front of dash

Harness Routing Views

Inline Harness Connector End Views

--

C103

Top of engine

Harness Routing Views

Inline Harness Connector End Views

--

C304

Left Side of transfer case (AWD only)

Harness Routing Views

Inline Harness Connector End Views

--

D101

Underhood fuse-relay center

Electrical Center Identification Views

--

--

P100

LH side front of dash, left of bulkhead

Harness Routing Views

--

--

G104

Right side front of dash, above blower motor

Harness Routing Views

--

--

G105

Thermostat housing

Power and Grounding Component Views

--

--

G106

Left rear of engine block, next to knock sensor

Harness Routing Views

--

--

G107

Left rear of engine block, next to knock sensor

Harness Routing Views

--

--

G110

Left side of front of dash, above battery

Harness Routing Views

--

--

G302

Right side of left frame rail, next to evaporative emission canister

Harness Routing Views

--

--

S109

Engine harness, 28.5 cm from underhood fuse-relay center

Harness Routing Views

--

--

S111

Engine harness, 17 cm from underhood fuse-relay center breakout, toward underhood fuse-relay center

Harness Routing Views

--

--

S112

Engine harness, 48.5 cm from C100 breakout, toward engine

Harness Routing Views

--

--

S113

Engine harness, 10.5 cm from underhood fuse-relay center breakout, toward underhood fuse-relay center

Harness Routing Views

--

--

S114

Engine harness, 4 cm from underhood fuse-relay center breakout, toward underhood fuse-relay center

Harness Routing Views

--

--

S116

Engine harness, 18 cm from mass airflow sensor breakout, toward engine

Harness Routing Views

--

--

S117

Engine harness, 2.5 cm from A/C low pressure cut-off switch breakout, toward engine

Harness Routing Views

--

--

S118

Engine harness, 6 cm from linear EGR valve solenoid breakout, toward underhood fuse-relay center

Harness Routing Views

--

--

S119

Engine harness, 9 cm from A/C low pressure cut-off switch breakout, toward engine

Harness Routing Views

--

--

S120

Engine harness, 6 cm from linear EGR valve solenoid breakout, toward rear of engine

Harness Routing Views

--

--

S122

Engine harness, 12.5 cm from linear EGR valve solenoid breakout, toward rear of engine

Harness Routing Views

--

--

S123

Engine harness, 6.5 cm from fuel Injector harness breakout, toward front of engine

Harness Routing Views

--

--

S124

Engine Harness, 15 cm from oil pressure switch breakout, toward C100

Harness Routing Views

--

--

S126

Engine harness, 6.5 cm from knock sensor connector breakout, toward front of engine

Harness Routing Views

--

--

S127

(Early 98)

Engine harness, 4 cm from electronic brake control module (EBCM) breakout, toward EBCM

Harness Routing Views

--

--

S130

Front of dash, 32 cm from forward lamp harness breakout, toward windshield washer motor

Harness Routing Views

--

--

S151

Engine harness, 26 cm from vehicle control module C1 connector

Harness Routing Views

--

--

S152

Engine harness, 5 cm from vehicle control module C1 connector breakout, towards C100

Harness Routing Views

--

--

S153

Engine harness, 26.5 cm from vehicle control module C1 connector

Harness Routing Views

--

--

S204

I/P harness, 9.5 cm from C201 connector, toward C100

Harness Routing Views

--

--

S206

I/P harness, 7 cm from C100 connector, toward right side of dash

Harness Routing Views

--

--

S210

I/P harness, 4 cm from C201 connector, toward cluster

Harness Routing Views

--

--

S213

I/P harness, 4 cm from headlamp switch breakout, toward headlamp switch connector

Harness Routing Views

--

--

S218

I/P harness, 4 cm from instrument cluster breakout, toward instrument cluster connector

Harness Routing Views

--

--

S224

I/P harness, 10 cm from headlamp switch connector breakout, toward right side of dash

Harness Routing Views

--

--

S233

I/P harness, 6.5 cm from data link connector breakout, toward data link connector

Harness Routing Views

--

--

S333 (2WD)

Engine harness, 29 cm from bank #1 heated oxygen sensor (HO2S) #3 connector breakout, toward vehicle speed sensor connector

Harness Routing Views

--

--

S333 (AWD)

Engine harness, 29 cm from bank #1 heated oxygen sensor (HO2S) #3 connector breakout, toward vehicle speed sensor connector

Harness Routing Views

--

--