GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch

On the front of the A/C compressor, in the left front side of the engine

HVAC Component Views in HVAC Systems with A/C - Manual, 1999 C/K Service Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual, 1999 C/K Service Manual

A/C Compressor Clutch Relay

In the underhood fuse block, in the left rear side of the engine compartment, on the fender

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

Electrical Center Identification Views in Wiring Systems

A/C Compressor Cycling Switch

On the top of the A/C compressor

HVAC Component Views in HVAC Systems with A/C - Manual, 1999 C/K Service Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual, 1999 C/K Service Manual

A/C Compressor High Pressure Cutout Switch

On the rear of the A/C compressor, on the left front side of the engine

HVAC Component Views in HVAC Systems with A/C - Manual, 1999 C/K Service Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual, 1999 C/K Service Manual

Camshaft Position Sensor

Top rear center of the engine

Engine Controls Component Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Engine Controls Cnnector End Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Crankshaft Position (CKP) Sensor

Lower RF of the engine block, near the Crankshaft

Engine Controls Component Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Cruise Control Module (CCM)

RR of the engine compartment, on the wheelhousing

Harness Routing Views in Wiring Systems

Cruise Control Connector End Views in Cruise Control Systems, 1999 C/K Service Manual

Data Link Connector (DLC)

Under RH of IP, to the right of the steering column, mounted to bottom of knee bolster

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Distributor

Located at the center rear of the engine

Engine Controls Component Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Electronic Brake Control Module (EBCM)

In the engine compartment at the LH front wheelhousing

ABS Component Views in Anitlock Brake System, 1999 C/K Service Manual

ABS Connector End Views in Anitlock Brake System, 1999 C/K Service Manual

Engine Coolant Temperature Sensor (Gas)

Top RF of the engine, near the thermostat housing

Engine Controls Component Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Evaporative Emissions Canister Purge Solenoid

At the top RH of the engine

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Exhaust Gas Recirculation (EGR) Valve

Top of the engine

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Front Axle Actuator

RF of the front drive axle

Transfer Case Component Views in Transfer Case, 1999 C/K Service Manual

Transfer Case Connector End Views in Transfer Case, 1999 C/K Service Manual

Fuel Pump/Oil Pressure Switch and Sender

In the engine with the oil sender

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Fuel Pump and Sender

In the fuel tank

Instrument Panel, Gages, and Console Component Views in Instrument Cluster

Instrument Panel, Gages, and Console Connector End Views in Instrument Cluster

Fuel Pump Prime Connector

RR of the engine compartment, near C102, toward P100

Harness Routing Views in Wiring Systems

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Fuel Pump Relay

In underhood fuse block, RR of the engine compartment, on the fender

Harness Component Views in Wiring Systems, 1999 C/K Service Manual

Electrical Center Identification Views in Wiring Systems

Fuel Tank Pressure Sensor

In the fuel tank

Instrument Panel, Gages, and Console Component Views in Instrument Cluster

Instrument Panel, Gages, and Console Connector End Views in Instrument Cluster

HVAC Control Module

Part of the heater controls, in the center of the IP, under the radio

HVAC Component Views in HVAC Systems with A/C Manual

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

Idle Air Control (IAC) Valve Motor

Attached to the RR of the throttle body

Engine Controls Component Views in Engine Controls - 5.7L or Engine Controls Component Views in Engine Controls - 6.5L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L or 6.5L, 1999 C/K Service Manual

Ignition Coil

RR of the engine

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Ignition Control Module

RR of the engine

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Instrument Cluster

On the upper right end of the IP, above the steering column

Instrument Panel, Gages, and Console Component Views in Instrument Cluster

Instrument Panel, Gages, and Console Connector End Views in Instrument Cluster

Intake Air Temperature (IAT) Sensor (Gas)

In the air intake duct

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

IP Fuse Block

To the right of the IP, near the right front door jamb switch

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Knock Sensor (5.7L)

RF of the engine block, below the exhaust manifold, forward of the starter

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Manifold Absolute Pressure (MAP) Sensor (Gas)

Top RH center of the intake manifold, near the fuel injectors

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L, 1999 C/K Service Manual

Mass Air Flow (MAF) Sensor

At the air intake duct, near the air filter, RH of the engine

Engine Controls Component Views in Engine Controls - 5.7 L or Engine Controls Component Views in Engine Controls - 6.5L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L or 6.5L, 1999 C/K Service Manual

Stoplamp Switch

On the top of the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Connector End Views in Lighting Systems, 1999 C/K Service Manual

Throttle Position (TP) Sensor

On side of the throttle body

Engine Controls Component Views in Engine Controls - 5.7L

Engine Controls Connector End Views in Engine Controls - 5.7L

Transfer Case Control Module (TCCM)

Mounted to the right side of the steering wheel supprot bracket, under the IP

Transfer Case Control Component Views in Transfer Case

Transfer Case Connector End Views in Transfer Case, 1999 C/K Service Manual

Transfer Case Select Switch

Center of the IP, RH of the steering column shift lever

Transfer Case Control Component Views in Transfer Case

Transfer Case Connector End Views in Transfer Case, 1999 C/K Service Manual

Transmission (M30)

Under center of vehicle, attached to the rear of engine

Automatic Transmission Electronic Component Views in Automatic Transmission, 1999 C/K Service Manual

Automatic Transmission Electronic Connector End Views in Automatic Transmission, 1999 C/K Service Manual

Transmission (MT1)

Under center of vehicle, attached to the rear of engine

Automatic Transmission Electronic Component Views in Automatic Transmission, 1999 C/K Service Manual

Automatic Transmission Electronic Connector End Views in Automatic Transmission, 1999 C/K Service Manual

Underhood Fuse Block

In the right rear side of the engine compartment, on the fender

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Vehicle Control Module (VCM) (Gas)

Engine compartment, near the EBCM

Engine Controls Component Views in Engine Controls - 5.7L

VCM Connector End Views in Engine Controls - 5.7L

Vehicle Speed Sensor (w/RWD)

LR of the transmission

Engine Controls Component Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Vehicle Speed Sensor (w/Selectable 4WD)

LR of the transfer case

Engine Controls Component Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Vehicle Speed Sensor Adapter (A/T w/4WD)

Located between the EBCM and the vehicle speed sensor

Engine Controls Component Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

Engine Controls Connector End Views in Engine Controls - 5.7L and 6.5L, 1999 C/K Service Manual

C100

Part of the engine harness to IP harness, in the left rear side of the engine compartment, at the bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103

Part of the engine harness to fuel pump motor, in the left rear side of the engine compartment, under the accumulator

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C120

Part of the engine harness to front axle actuator, in the rear of the engine, near the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C122 (M30)

On the right side of the transmission

Harness Routing Views in Wiring Systems, 1999 C/K Service Manual

Inline Harness Connector End Views in Wiring Systems

C122 (MT1)

On the left side of the transmission

Harness Routing Views in Wiring Systems, 1999 C/K Service Manual

Inline Harness Connector End Views in Wiring Systems

C130

Part of the engine harness, in the left rear side of the engine compartment, under the accumulator

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

Behind the right side of the IP, near the heater motor, in foam wrap

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C227 (Stoplamp Switch)

IP harness, Inline to the stoplamp switch

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103 (Gas)

On the right front side of the engine, near the thermostat housing

Power and Grounding Component Views in Wiring Systems

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G104 (Gas)

Backside of the right cylinder head

Power and Grounding Component Views in Wiring Systems

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G105 (Gas)

On the right front side of the engine block

Power and Grounding Component Views in Wiring Systems

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G200

Behind the right side of the IP, on the right side of the knee bolster

Power and Grounding Component Views in Wiring Systems

--

G404

Inside the left side frame rail, near the rear crossmember

Power and Groudn Component Views in Wiring Systems, 1999 C/K Service Manual

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P100

In the right rear side of the engine compartment, at the bulkhead, to the left of C100

Harness Routing Views in Wiring Systems

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P101

In the left rear side of the engine compartment, at the bulkhead

Harness Routing Views in Wiring Systems

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S101 (Gas)

Engine harness approximately 19 cm (7.5 in) from the EGR valve breakout, towrd the ignition coil breakout

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--

S103 (Gas)

Engine harness, approximately 8 cm (3 in) before the EGR valve harness breakout, toward the taillamp harness breakout

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--

S104 (Gas)

Engine harness, approximately 9.5 cm (4 in) into the fuel Injector breakout

--

--

S106 (Gas)

Engine harness, approximately 17 cm (6.5 in) from EGR valve breakout, toward fuel injector breakout

--

--

S107 (Gas)

Engine harness, approximately 20 cm (8 in) from EGR valve breakout, toward taillamp harness breakout

--

--

S108 (Gas)

Engine harness, approximately 11.5 cm (4.5 in) from ignition coil breakout, toward starter solenoid

--

--

S111 (Gas)

Engine harness, approximately 30 cm (12 in) from EBCM breakout, toward the EGR valve breakout

--

--

S147 (Gas)

engine harness, approximately 5 cm (2 in) from EGR valve breakout, toward taillamp harness breakout

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--

S150 (Gas)

Engine harness, approximately 13 cm (5 in) inside the EBCM harness breakout

--

--

S151

Engine harness, approximately 7 cm (2.5 in) inside EBCM harness breakout

--

--

S152 (Gas)

Engine harness , approximately 6.5 cm (2.5 in) from EBCM breakout, toward P101

--

--

S161 (Gas)

Engine harness, approximately 11 cm (4 in) from the EGR valve breakout, toward the taillamp harness breakout

--

--

S185

At Diode D104

--

--

S186

At Diode D104

--

--

S204

IP harness, approximately 9 cm (3.5 in) from the steering column harness breakout, toward the convenience center

--

--

S209 (Gas)

IP harness, approximately 4 cm (1.5 in) from the inflatable resitraint module brekout, toward the courtesy lamp breakout

--

--

S211 (Gas)

IP harness approximately 4 cm (1.5 in) from engine harness breakout

--

--

S212

IP harness, approximately 8 cm (3 in) from inflatable restraint switch breakout

--

--

S213

IP harness, approximately 4 cm (1.5 in) from steering column harness breakout, towards the DLC

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--

S215

IP harness, approximately 4 cm (1.5 in) from instrument cluster breakout, toward radio connectors breakout

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--

S221

IP harness, approximately 8 cm (3 in) fbefore the transfer case control module

--

--

S222

IP harness, approximately 20 cm (8 in) from the radio connectors breakout, toward the temperature actuator breakout

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--

S231 (5.0L, 5.7L)

Engine harness, approximately 16 cm (6 in) from EGR valve breakout, toward taillamp harness

--

--

S231 (Gas)

Engine harness, approximately 15 cm (6 in) from EGR valve breakout, toward the taillamp harness breakout

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--

S232 (5.0L - HD, 5.7L - HD)

Engine harness, approximately 10 cm (4 in) from EGR valve breakout

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--

S232 (Gas)

Engine harness, approximately 27 cm (10.5 in) from EGR valve breakout

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--

S268

IP harness, approximately 4 cm (1.5 in) into the HVAC Control Switch harness breakout

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--

S430

Taillamp extension harness, approximately 6 cm (2.5 in) from fuel pump harness breakout, toward C409

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--

S430 (Gas Suburban)

Rear lamp extension harness, approximately 5 cm (2 in) from the fuel sender breakout, toward C130

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--

S430 (Gas Utility)

Front-to-rear body harness, approximately 7 cm (3 in) from the fuel sender breakout, toward C130

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