GM Service Manual Online
For 1990-2009 cars only

4.3L Engine Controls Component Locator Table

Name

Location

Locator View

Connector End View

1-2 Shift Solenoid Valve

In the Automatic Transmission

--

8A-202

2-3 Shift Solenoid Valve

In the Automatic Transmission

--

8A-202

3-2 Shift Solenoid Valve

In the Automatic Transmission

--

8A-202

A/C Compressor

Top LH front of engine

8A-201

8A-202

A/C Compressor Clutch Diode

In engine harness 7.5 cm from the breakout to the A/C Compressor and high pressure switch

8A-201

--

A/C Compressor Cycling Switch

RH rear of engine near accumulator

8A-201

8A-202

A/C Compressor High Pressure Cut Off Switch

Rear of A/C Compressor

8A-201

8A-202

A/C Compressor Relay

Center rear of engine compartment

8A-201

8A-202

A/C Request Voltage Drop Resistor

I/P Harness, 7.5 cm right of relay center breakout

8A-201

--

Automatic Transmission

(In Line Connector C175) RH side of transmission

8A-201

8A-202

Automatic Transmission Fluid Pressure Manual Valve Position Switch

In the Automatic Transmission

--

8A-202

Brake Pressure Modulator Valve

LH side of engine compartment above wheel house

8A-201

--

Connector C1 (10 Cavities)

--

--

8A-202

Camshaft Position Sensor

Rear edge of distributor

8A-201

8A-202

Clutch Pedal Position And Cruise Control Shutoff Switch

On clutch pedal support bracket

8A-201

8A-202

Crankshaft Position Sensor

Below RH front of engine near harmonic balancer

8A-201

8A-202

Cruise Control Module

LH rear of engine compartment on cowl

8A-201

8A-202

Data Link Connector

Lower LH side of instrument panel

8A-201

8A-202

Distributor

Top rear of engine

8A-201

--

Electronic Brake Control Module

Part of Brake Pressure Modulator Valve

--

--

Electronic Ignition Control Module (Electronic Spark Control)

Top RH center of engine

8A-201

--

Engine Coolant Temperature Sensor

Top front center of engine on thermostat housing

8A-201

8A-202

Evaporative Emission Canister Purge Solenoid Valve

Top RH center of engine, just to the right of the injector connector

8A-201

8A-202

Evaporative Emission Canister Vent Solenoid Valve

Crossmember area of fuel tank

8A-201

8A-202

Exhaust Gas Recirculation Valve

Front center of engine

8A-201

8A-202

Fuel Injector # 1

Top center of engine

8A-201

--

Fuel Injector # 2

Top center of engine

8A-201

--

Fuel Injector # 3

Top center of engine

8A-201

--

Fuel Injector # 4

Top center of engine

8A-201

--

Fuel Injector # 5

Top center of engine

8A-201

--

Fuel Injector # 6

Top center of engine

8A-201

--

Fuel Level Buffer Module

Under the I/P Compartment

8A-201

8A-202

Fuel Level Sensor With Fuel Pump (Fuel Sender With Pump)

Top of fuel tank

8A-201

8A-202

Fuel Pump Prime Connector

LH rear side of engine compartment

8A-201

8A-202

Fuel Pump Relay

In relay center

8A-201

8A-202

Fuel Pump Switch And Engine Oil Pressure Gauge Sensor

Center rear top of engine block, near distributor

8A-201

8A-202

Fuel Tank Pressure Sensor

Top of fuel tank

8A-201

8A-202

Heated Oxygen Sensor, LH Front

On the rear of the LH exhaust pipe on the left side of the transmission

8A-201

8A-202

Heated Oxygen Sensor, Post-Converter

Rear of catalytic converter

8A-201

8A-202

Heated Oxygen Sensor, Pre-Converter

Forward of catalytic converter

8A-201

8A-202

Heated Oxygen Sensor, RH Front

RH rear of engine in exhaust pipe

8A-201

8A-202

Heater And A/C Controller

Upper center of instrument panel

8A-201

--

Connector C1 (3 Cavities)

--

-

8A-202

I/P Fuse Block

LH side of instrument panel

8A-201

8A-11

Idle Air Control Valve

Upper LH portion of the throttle body assembly, just below the throttle position sensor

8A-201

8A-202

Ignition Coil

Top RH side of engine

8A-201

--

Instrument Cluster

LH side of instrument panel

8A-201

8A-202

Intake Air Temperature Sensor

LH front of engine compartment in air intake duct

8A-201

8A-202

Knock Sensor

Top rear LH center portion of cylinder block, near bell housing

8A-201

8A-202

Manifold Absolute Pressure Sensor

Top center RH portion of engine, near injector connector

8A-201

8A-202

Mass Air Flow Sensor

LH front of engine compartment on air intake duct

8A-201

8A-202

Pressure Control Solenoid Valve

In the Automatic Transmission

--

8A-202

Radio

Center of instrument panel

8A-201

--

Connector C2 (6 Cavities)

--

--

8A-202

Relay Center

Behind instrument panel compartment box

8A-201

8A-202

Spark Plug # 1

LH side of engine

8A-201

--

Spark Plug # 2

RH side of engine

8A-201

--

Spark Plug # 3

LH side of engine

8A-201

--

Spark Plug # 4

RH side of engine

8A-201

--

Spark Plug # 5

LH side of engine

8A-201

--

Spark Plug # 6

RH side of engine

8A-201

--

TCC Brake And Cruise Control Release Switch

On brake pedal support bracket

8A-201

8A-202

Throttle Position Sensor

LH upper forward portion of the throttle body assembly

8A-201

8A-202

Torque Converter Clutch Pulse Width Modulation Solenoid Valve

In the Automatic Transmission

--

8A-202

Torque Converter Clutch Solenoid Valve

In the Automatic Transmission

--

8A-202

Transmission Fluid Temperature Sensor

In the Automatic Transmission

--

8A-202

Vehicle Control Module

RH side of engine compartment

8A-201

--

Connector C1 (32 Cavities)

--

--

Engine Controls Connector End Views

Connector C2 (32 Cavities)

--

--

Engine Controls Connector End Views

Connector C3 (32 Cavities)

--

--

Engine Controls Connector End Views

Connector C4 (24 Cavities)

--

--

Engine Controls Connector End Views

Connector C5 (5 Cavities)

--

--

8A-202

Vehicle Speed Sensor (With Manual Transmission)

LH rear of transmission

8A-201

8A-202

Vehicle Speed Sensor (With Automatic Transmission)

RH Rear of transmission

8A-201

8A-202

C100 (8 cavities)

Engine harness to oxygen sensor harness, rear of VCM near blower motor

8A-201

8A-202

C101 (7 cavities)

Engine harness to I/P extension harness, RH side of engine compartment near VCM

8A-201

8A-202

C102 (15 cavities)

Engine harness to front of dash harness, LH rear of engine compartment above brake booster

8A-201

8A-202

C104 (6 cavities)

Engine harness to chassis harness, forward of lower portion of A/C evaporator coil housing

8A-201

8A-202

C105 (4 cavities)

Engine to oxygen sensor harness, LH frame rail, near vehicle speed sensor

8A-201

8A-202

C107 (7 cavities)

Front of dash harness to chassis harness, engine compartment near power distribution center

8A-201

8A-202

C111 (12 cavities)

Engine harness to fuel injector, on top of engine at the fuel injector

8A-201

8A-202

C116 (2 cavities) (W/Automatic Transmission)

Engine harness to VSS extension harness, near C175, passes over the top of the transmission

8A-201

8A-202

C125 (4 cavities)

Oxygen sensor harness to oxygen sensor pigtail, RH frame rail approximately mid way between the catalytic converter and muffler

8A-201

8A-202

C126 (4 cavities)

Oxygen sensor extension harness to heated oxygen sensor pigtail, on RH frame rail, just forward of Y pipe

8A-201

8A-202

C127 (4 cavities)

Oxygen sensor extension harness to heated oxygen sensor pigtail, RH side of frame rail, to the rear of the Y pipe

8A-201

8A-202

C175 (13 cavities)

Engine harness to transmission, RH side of transmission just forward of Catalytic Converter

8A-201

8A-202

C200 (23 cavities)

Front of dash harness to I/P harness, behind RH side of instrument panel

8A-201

8A-202

C201 (23 cavities)

I/P harness to I/P extension harness, behind RH side of instrument panel

8A-201

8A-202

C202 (6 cavities)

I/P harness to I/P extension harness, behind RH side of instrument panel

8A-201

8A-202

C203 (56 cavities)

Front of dash harness to I/P harness, behind instrument panel, RH side

8A-201

8A-202

G101

LH rear of engine compartment to the left of the A/C compressor relay

8A-201

--

G102

RH rear of engine, on head

8A-201

--

G103

RH rear of engine, on head

8A-201

--

G104

LH rear portion of cylinder head

8A-201

--

G105

LH rear portion of cylinder head

8A-201

--

G402

LH rear of chassis on crossmember

8A-201

--

P100

At cowl on LH rear of engine compartment

8A-201

--

P101

At cowl on RH rear of engine compartment

8A-201

--

S100

Engine harness, 30 cm from VCM connector breakout

8A-201

--

S101

Engine harness 6.5 cm from generator breakout

8A-201

--

S102

Engine harness, 8 cm left of generator breakout

8A-201

--

S103

Engine harness, 7.5 cm from the A/C compressor and high pressure cut out switch breakout

8A-201

--

S104

In engine harness, 7.5 cm from the breakout to the A/C Compressor and High Pressure Cutout Switch

8A-201

--

S105

Engine harness, 2 cm from generator fusible link breakout toward fuel injector connector

8A-201

--

S106

Engine harness, 4 cm from generator breakout and toward the C104 connector

8A-201

--

S107

Engine harness, 4 cm from C104 breakout and toward the generator breakout

8A-201

--

S108

Engine harness, 13 cm from C102, C104 breakout and toward the connectors

8A-201

--

S109

Engine harness, 7 cm to the right of C102, C103, and C104 breakout

8A-201

--

S112

Engine harness, 38 cm left of C105 breakout, LH side of engine

8A-201

--

S129

In the automatic transmission

8A-201

--

S140

Engine harness, 15 cm from connector C116

8A-201

--

S209

I/P harness, 39 cm right of instrument cluster breakout

8A-201

--

S210

I/P harness, 43 cm right of instrument cluster breakout

8A-201

--

S212

I/P harness, 7 cm into the radio breakout

8A-201

--

S213

I/P harness, 4 cm left of cigarette lighter breakout

8A-201

--

S218

I/P harness, 5 cm left of relay center breakout

8A-201

--

S220

I/P harness, 6 cm into relay center breakout

8A-201

--

S221

I/P harness, 5 cm right of relay center breakout

8A-201

--

S224

I/P harness, 7 cm right of relay center breakout

8A-201

--

S225

I/P harness, 7 cm right of relay center breakout

8A-201

--

S227

Front of Dash, 8 cm into the data link connector breakout

8A-201

--

S230

Front of dash harness, 25 cm right of P100

8A-201

--

S231

Front of dash harness, 4 cm into clutch pedal position switch breakout

8A-201

--

S238

Front of dash harness, 11 cm into TCC Brake and Cruise Control Release Switch breakout

8A-201

--

S239

Front of dash harness, 18 cm from TCC Brake and Cruise Control Release Switch

8A-201

--

S241

In front-of-dash harness 6 cm to the right of the steering column breakout

8A-201

--

S244

Front of dash harness, 26 cm right of steering column breakout

8A-201

--

S250

Front of dash harness, 13 cm right of 4WD indicator breakout

8A-201

--

S266

I/P harness, on breakout to instrument cluster, 6 cm from the breakout

8A-201

--

S317

Oxygen Sensor extension harness, 10 cm to the rear of the breakout for C126

8A-201

--

S318

Oxygen sensor jumper, 16 cm forward of C127 breakout

8A-201

--

S422

Chassis harness, between the breakouts to arming sensor and fuel pump, 7.5 cm from the fuel pump breakout

8A-201

--