GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

1-2 Shift Solenoid (1-2 SS) Valve

In the automatic transmission

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

2-3 Shift Solenoid (2-3 SS) Valve

In the automatic transmission

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

3-2 Shift Solenoid (3-2 SS) Valve

In the automatic transmission

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

A/C Compressor Clutch Coil

Part of A/C Compressor

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

A/C Compressor Clutch Diode

In the engine harness breakout, 8  cm (3.2 in) from the breakout to the A/C Compressor high pressure switch

HVAC Component Views in HVAC Systems with A/C - Automatic

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A/C Compressor Clutch Relay

In the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

A/C Compressor High Pressure Cutoff Switch

Rear of A/C Compressor

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

A/C Compressor Cycling Switch

At the A/C Accumulator

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Inside the automatic transmission

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Body Control Module (BCM)

Lower rear of IP on the heater assembly

Body Control System Component Views in Body Control Systems

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Body Control Module (BCM) Connector C2 (24 Cavities)

Lower rear of IP on the heater assembly

Body Control System Component Views in Body Control Systems

Body Control System Connector End Views in Body Control Systems

Body Relay Block

RH side of IP, near IP fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Camshaft Position (CMP) Sensor

Rear of Distributor

Engine Controls Component Views

Engine Controls Connector End Views

Central Sequential Fuel Injection (CSFI)

Top center of engine, forward of distributor

Engine Controls Component Views

Engine Controls Connector End Views

Clutch Pedal Position (CPP) Switch

On clutch pedal support bracket

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Crankshaft Position (CKP) Sensor

Below RH front of engine near harmonic balancer

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Module (CCM)

RH Rear of engine compartment on cowl

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Lower RH of the IP

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Driver Information Display Module Connector C1 (6 Cavities)

Front overhead console in the passenger compartment

Driver Information System Components Views in Instrument Panel, Gauges, and Console

Driver Information Systems Connector End Views in Instrument Panel, Gauges, and Console

Electronic Brake Control Module (EBCM)

On the Brake Pressure Modulator Valve (BPMV), towards the rear of the RH fenderwell

Antilock Brake System Component Views in Antilock Brakes

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Electronic Brake Control Module (EBCM) Connector C1 (10 Cavities)

Body harness connector on LH of the EBCM

Antilock Brake System Component Views in Antilock Brakes

Antilock Brake System Connector End Views in Antilock Brakes

Electronic Climate Control (ECC)Module

The center of the IP, below the radio

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

Electronic Ignition Control Module (EICM) (Part of Ignition Coil Assembly)

Top RH side of engine

Engine Controls Component Views

Engine Controls Connector End Views

Engine Coolant Temperature (ECT) Sensor

LH side of engine, at the spark plugs

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions Canister Purge Solenoid Valve

Top RH center of the engine, near fuel injector connector

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions Canister Control Valve

Crossmember area of fuel tank, rear center of crossmember behind fuel tank

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

Top front of engine, near the drive belt

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump and Sender

Internal to the fuel tank

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump Relay

In the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Fuel Tank Pressure Sensor

The three wire connector at the top of the fuel tank

Engine Controls Component Views

Engine Controls Connector End Views

Generator

RF of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Heated Oxygen Sensor (HO2S), Bank 1, Sensor 1

LH Rear of the exhaust pipe, LH of the transmission

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor(HO2S), Bank 1, Sensor 3

Rear of the catalytic converter, in the exhaust pipe

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S), Bank 2, Sensor 1

RH side of the engine, in the exhaust pipe

Engine Controls Component Views

Engine Controls Connector End Views

Idle Air Control Valve (IAC) Valve

Top RH of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Coil

Top RH of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Instrument Cluster

In the IP, ahead of the steering column

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

LF of the engine compartment, in air intake duct

Engine Controls Component Views

Engine Controls Connector End Views

IP Fuse Block

RH of the IP, near the side door jamb switch

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Knock Sensor (KS)

Top rear of the engine, above the transmission bell housing, on the LH side

Engine Controls Component Views

Engine Controls Connector End Views

Manifold Absolute Pressure (MAP) Sensor

Top center of the engine

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow (MAF) Sensor

LF of the engine compartment, on air intake duct

Engine Controls Component Views

Engine Controls Connector End Views

Park/Neutral Position and Backup Lamp Switch

LH of the transmission

Shift Lock Control Component Views in Automatic Transmission

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Park/Neutral Position and Backup Lamp Switch, Connector C1 (7 cavities)

LH of the transmission

Shift Lock Control Component Views in Automatic Transmission

Shift Lock Control Connector End Views in Automatic Transmission

Park/Neutral Position and Backup Lamp Switch, Connector C2 (4 cavities)

LH of the transmission

Shift Lock Control Component Views in Automatic Transmission

Shift Lock Control Connector End Views in Automatic Transmission

Pressure Control Solenoid (PC SOL) Valve

In the automatic transmission

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Stop Lamp Switch

Mounted on the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Throttle Position (TP) Sensor

Top LH of the engine, on the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

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

In the automatic transmission

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Torque Converter Clutch Solenoid (TCC SOL) Valve

In the automatic transmission

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Transfer Case Shift Control Module

Behind LH Front kick panel

Transfer Case Control Component Views in Transfer Case - NP8

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Transfer Case Shift Control Module Connector C1(32 Cavities)

Behind LH Front kick panel, the lower connector

Transfer Case Control Component Views in Transfer Case - NP8

Transfer Case Control Connector End Views in Transfer Case - NP8

Transmission Fluid Temperature (TFT) Sensor

Part of the Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Transmission Component Location in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Underhood Fuse Block

On the top of the right inner fenderwell

Power and Grounding Component Views in Wiring Systems

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Underhood Fuse Block Connector C1 (68 Cavities) (Body)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C2 (68 Cavities) (Engine)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C3 (32 Cavities) (Chassis)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM)

LH side of engine compartment

Engine Controls Component Views

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Vehicle Control Module (VCM) Connector C1 Blue (32 Cavities)

LH side of engine compartment

Engine Controls Component Views

VCM Connector End Views

Vehicle Control Module (VCM) Connector C2 Red (32 Cavities)

LH of the engine compartment

Engine Controls Component Views

VCM Connector End Views

Vehicle Control Module (VCM) Connector C3 Clear (32 Cavities)

LH of the engine compartment

Engine Controls Component Views

VCM Connector End Views

Vehicle Control Module (VCM) Connector C4 Black (24 Cavities)

LH of the engine compartment

Engine Controls Component Views

VCM Connector End Views

Vehicle Speed Sensor (VSS)

Top left rear of the transfer case

Engine Controls Component Views

Engine Controls Connector End Views

C100 (6 Cavities)

Engine harness to heated oxygen sensor extension harness, to the rear of the engine compartment, near the A/C accumulator

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101(8 Cavities)

Engine harness to body harness, RH engine compartment, near the VCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C104 (6 Cavities)

Chassis to engine harness, LH side of transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C130 (7 Cavities)

Chassis harness to forward lamp harness connector

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C175 (13 Cavities)

Engine harness to A/T connector, on the right rear of the A/T

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

C203 (116 Cavities)

Body harness to IP harness, to the left of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C209 (16 Cavities)

Body harness to dome harness, LH front of IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102

(CKT 350) At the engine harness, to the right rear of the cylinder head

Harness Routing Views in Wiring Systems

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G103

(CKT 351) At the engine harness, to the right rear of the cylinder head

Harness Routing Views in Wiring Systems

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G104

(CKT 450) At the engine harness, to the left rear of the cylinder head

Harness Routing Views in Wiring Systems

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G105

(CKT 451) At the engine harness, to the left rear of the cylinder head

Harness Routing Views in Wiring Systems

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G203

(CKT 1050) At the body harness, to the right of the IP

Harness Routing Views in Wiring Systems

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G205

(CKT 1050) At the body harness, to the right of the IP

Harness Routing Views in Wiring Systems

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G402

(CKT 22, CKT 1650) At the chassis harness, near the top center of the second cross-member from the rear, with the fuel filler neck ground strap

Harness Routing Views in Wiring Systems

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P100

At the IP bulkhead pass-through, to the RH rear of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

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S100

(CKT 452) In the engine harness between the breakouts for the VCM connector C2 and the engine coolant temperature connector, 10.5 cm (4.2 in.) from the VCM C2 connector breakout

Harness Routing Views in Wiring Systems

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S101

(CKT 474) In the engine harness between the breakouts to the electronic ignition control module and the fuel injector connector, 5 cm (2 in) from the breakout to the electronic ignition control module

Harness Routing Views in Wiring Systems

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S102

(CKT 470) In the engine harness between the breakouts for the electronic ignition control module and the fuel injector connector, 5 cm (2 in) from the breakout to the fuel injection connector

Harness Routing Views in Wiring Systems

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S103

(CKT 350) In the engine harness breakout to the A/C compressor clutch connector and A/C compressor cutoff switch connector, 7.5 cm (3 in) from the breakout

Harness Routing Views in Wiring Systems

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S104

(CKT 59) In the engine harness breakout to the A/C compressor clutch connector and A/C compressor cutoff switch connector, 7.5 cm (3 in) from the breakout

Harness Routing Views in Wiring Systems

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S106

(CKT 351) In the engine harness between the breakouts to the connector for the engine coolant temperaturessensor and the VCM connector C2, 27.5 cm (11 in) from the breakout to the VCM connector C2

Harness Routing Views in Wiring Systems

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S113

(CKT 1020) In the forward lamp harness between the breakouts to the park lamp switch relay connector and the power radio antenna connector, 19.5 cm (7.68 in) from the power radio antenna connector breakout

Harness Routing Views in Wiring Systems

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S138

(CKT 420) Body harness between the breakouts to the power radio antenna connector and the park lamp switch relay, 6.5 cm (2.6 in) from the breakout to the power radio antenna connector

Harness Routing Views in Wiring Systems

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S150

(CKT 539) At the heated oxygen sensor (HO2S) harness, 10 cm (4 in) behind the breakout to the right front heated oxygen sensor connector

Harness Routing Views in Wiring Systems

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S151

(CKT 539) At the heated oxygen sensor (HO2S) harness, 10 cm (4 in) in front of the breakout to the right front heated oxygen sensor connector

Harness Routing Views in Wiring Systems

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S152

(CKT 351 and 451) Engine harness between the breakouts for the left rear and right rear engine block grounds, 15 cm (5.91 in) from the breakout to the right rear engine block ground

Harness Routing Views in Wiring Systems

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S201

(CKT 1807) Body harness 13 cm (5.2 in) from the BCM connector breakout toward C211

Harness Routing Views in Wiring Systems

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S203

(CKT 241) Body harness 39 cm (15.35 in) from the BCM connector breakout toward C211

Harness Routing Views in Wiring Systems

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S207

(CKT 817) Body harness 32.5 cm (12.8 in) from the BCM connector breakout toward C211

Harness Routing Views in Wiring Systems

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S211

(CKT 1050) Body harness, 6.5 cm (2.56 in) from the G203, G204, G205 ground breakout and the ground terminals

Harness Routing Views in Wiring Systems

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S223

(CKT 300) IP harness, near the IP fuse block, in the breakout, 8 cm (15 in) from C217

Harness Routing Views in Wiring Systems

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Splice Pack SP423

(CKT 470, CKT 1650, CKT 2109) Chassis harness on top of the rear crossmember

Harness Routing Views in Wiring Systems

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