GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Convenience Center

Under the IP, on the left side

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

Daytime Running Lamp (DRL) Control Module

Under the left side of the instrument panel (IP), taped on the IP harness

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Engine Coolant Temperature Gauge Sensor

On the left side of the engine

    •  Engine Controls Component Views in Engine Controls (4.3L)
    •  Engine Controls Component Views in Engine Controls (5.0,5.7L)
    •  Engine Controls Component Views in Engine Controls (6.5L)
    •  Engine Controls Component Views in Engine Controls (7.4L)
    •  Engine Controls Connector End Views in Engine Controls (4.3L)
    •  Engine Controls Connector End Views in Engine Controls (5.0,5.7L)
    •  Engine Controls Connector End Views in Engine Controls (6.5L)
    •  Engine Controls Connector End Views in Engine Controls (7.4L)

Engine Oil Pressure Gauge Sensor

On the top rear of the engine

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Gauge

In the right side of the instrument cluster

Instrument Panel, Gages, and Console Component Views

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Fuel Pump (FP) and Sender 35 Gal.

In the fuel tank, under the rear of the vehicle

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Pump (FP) and Sender 55 Gal.

In the fuel tank, under the rear of the vehicle

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Sender Buffer Module

Below the right side of the IP, on the inner knee bolster

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Tank Level Sender (Diesel) 35 Gal.

In the fuel tank, under the rear of the vehicle

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Tank Level Sender (Diesel) 55 Gal.

In the fuel tank, under the rear of the vehicle

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Generator (4.3L)

On the right front of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Generator (5.0L/5.7L)

On the right front of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Generator (6.5L)

On the right front of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Generator (7.4L)

On the right front of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Generator (Ambulance Package)

On the left front of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Headlamp Dimmer Switch

Part of the turn signal lever, on the left side of the steering column

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp Switch

On the left front of the IP

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Inflatable Restraint Sensing and Diagnostic Module

Under the left front seat

SIR Component Views in SIR

SIR Connector End Views in SIR

Instrument Cluster

Center of IP

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

IP Fuse Block

LH Kick Panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Key-In Warning Switch

Inside the steering column

Lighting Systems Component Views in Lighting Systems

Audible Warnings Connector End Views in Audible Warnings

Left Front Door Jamb Switch

Part of the door jamb latch, on the left front inner door

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Low Engine Coolant Indicator Lamp

In the right side of the instrument cluster, part of the instrument cluster

Instrument Panel, Gages, and Console Component Views

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Low Engine Coolant Indicator Module

Under the IP, on the left side

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Low Engine Coolant Indicator Sensor

In the front of the engine compartment, under the coolant recovery/surge tank

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Multifunction Alarm Module

Under left side of the IP

Audible Warnings Component Views in Audible Warnings

Audible Warnings Connector End Views in Audible Warnings

Park/Neutral Position Switch

Left rear of transmission case

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Passlock Module

Below the center of the IP

Theft Deterrent System Component Views in Theft Deterrent

Theft Deterrent System Connector End Views in Theft Deterrent

Powertrain Control Module (PCM)

Behind the center of the IP

Engine Controls Component Views in Engine Controls 6.5L

Powertrain Control Module Connector End Views in Engine Controls 6.5L

Radio

In the center of the IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Seat Belt Switch

Part of seat belt

Seat Belt Component Views in Seat Belts

Seat Belt Connector End Views in Seat Belts

Vehicle Control Module (VCM)

In the engine compartment, on the left fender

    •  Engine Controls Component Views in Engine Controls (4.3L)
    •  Engine Controls Component Views in Engine Controls (5.0,5.7L)
    •  Engine Controls Component Views in Engine Controls (7.4L)
    •  VCM Connector End Views in Engine Controls (4.3L)
    •  VCM Connector End Views in Engine Controls (5.0,5.7L)
    •  VCM Connector End Views in Engine Controls (7.4L)

Vehicle Immobilizer Module

In the crossbody harness, behind the instrument panel, in the right center of the bulkhead

Theft Deterrent System Component Views in Entertainment

Theft Deterrent System Connector End Views in Entertainment

Vehicle Speed Sensor (VSS) Buffer

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

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Water-in-fuel Indicator Sensor

On the left frame rail, near the center of the vehicle

Engine Controls Component Views in Engine Controls 6.5L

Engine Controls Connector End Views in Engine Controls 6.5L

C100

In the left rear of the engine compartment at the bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101

Engine harness, on the left top of the engine

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C102

In the left side of the engine compartment, near the fender well

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C115

In the right side of the engine compartment, next to the generator

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C122

IP harness, approximately 25 cm from the c102 breakout

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

Steering column harness at the base of the column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C207

Crossbody harness, in the convenience center, under the IP, on the left side

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C210

Crossbody harness, under the left side of the IP, near the break pedal at the convenience center

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C211

Crossbody harness, under the left kick panel

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

IP harness, behind the left side of the IP, near the center of the vehicle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C301 (Gasoline Engine)

Engine harness, in line to the fuel pump harness on the left frame rail, near the EBCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C301 (Diesel Engine)

Engine harness, in line to the fuel pump harness on the left frame rail, near the EBCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

Engine harness, near the thermostat housing

Power and Grounding Component Views in Wiring Systems

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G103 (4.3L)

Engine harness, at the generator bracket

Power and Grounding Component Views in Wiring Systems

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G103 (5.0L, 5.7L, 7.4L)

In the left front of the engine harness, at the rear of the right cylinder head

Power and Grounding Component Views in Wiring Systems

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G103 (6.5L)

Engine harness, at the generator bracket

Power and Grounding Component Views in Wiring Systems

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G109

In the right side of the engine compartment, near the fender well

Power and Grounding Component Views in Wiring Systems

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G200

Behind the left kick panel, near the power door lock control module

Power and Grounding Component Views in Wiring Systems

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G201

IP harness, behind the left kick panel, near the IP fuse block

Power and Grounding Component Views in Wiring Systems

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P100

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

Harness Routing Views in Wiring Systems

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P101

Under the right side of the IP

Harness Routing Views in Wiring Systems

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P500

At the left front door

Harness Routing Views in Wiring Systems

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S101 (4.3L)

In the engine harness, approximately 20 cm (8 in) from the knock sensor breakout, toward the EBCM

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S101 (5.0L, 5.7L)

In the engine harness, approximately 22 cm (9 in) from the ignition coil breakout, toward the transmission breakout

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S101 (6.5L)

In the engine harness, approximately 11 cm (4 in) from the A/C compressor breakout, toward C101

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S101 (7.4L)

In the engine harness, approximately 14 cm (5 in) from the ignition coil breakout, toward the A/T input shaft speed sensor breakout

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S102 (4.3L)

In the engine harness, approximately 104 cm (41 in) from the underhood fuse-relay center, toward the A/C compressor breakout

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S102 (5.0L, 5.7L)

In the engine harness, approximately 104 cm (41 in) from the underhood fuse-relay center, toward the A/C compressor breakout

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S102 (6.5L)

In the engine harness, approximately 4 cm (2 in) from the A/C compressor breakout, toward C101

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S102 (7.4L)

In the engine harness, approximately 104 cm (41 in) from the underhood fuse-relay center, toward the A/C compressor breakout

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S103 (4.3L)

In the engine harness, approximately 4 cm (2 in) from the throttle position sensor breakout, toward the transmission

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S103 (5.0, 5.7L)

In the engine harness, approximately 4 cm (2 in) from the A/C compressor breakout, toward the MAF sensor

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S103 (7.4L)

In the engine harness, approximately 8 cm (3 in) from the ECT sensor breakout, toward the knock sensor breakout

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S118

In the forward lamp harness, approximately 22 cm (9 in) into the right forward lamp breakout

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S136 (4.3L)

In the engine harness, approximately 111 cm (44 in) from the underhood fuse-relay center, toward the A/C compressor breakout

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S136 (5.0L, 5.7L)

In the engine harness, approximately 6 cm (2.5 in) from the right heated oxygen sensor breakout, toward the fuel injector breakout

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S136 (7.4L)

In the engine harness, approximately 7 cm (3 in) from the ECT sensor breakout, toward the EGR valve breakout

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S158 (6.5L)

In the engine harness, approximately 31 cm (12 in) from the A/C compressor breakout, toward the underhood fuse relay center

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S201

In the IP harness, approximately 4 cm (2 in) from the park brake warning switch breakout, toward the data link connector (DLC) breakout

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S202

In the IP harness, approximately 7 cm (3 in) into the Passlock module breakout

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S206

In the crossbody harness, approximately 21 cm (8 in) from the power door lock relay breakout, toward the illuminated entry module breakout

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S209

In the IP harness, approximately 40 cm (16 in) into the inflatable restraint sensing and diagnostic module breakout

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S216

In the IP harness, approximately 8 cm (3 in) from the C200 breakout, toward the instrument cluster breakout

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S222

In the IP harness, approximately 8 cm (3 in) into the IP relay center breakout

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S223

In the IP harness, approximately 17 cm (7 in) from the HVAC switch breakout, toward the instrument cluster breakout

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S224

In the IP harness, approximately 4 cm (2 in) into the headlamp switch breakout

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S238

In the IP harness, approximately 23 cm (9 in) into the VSS buffer module breakout

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S246

In the IP harness, approximately 25 cm (10 in) from the HVAC switch breakout, toward the instrument cluster breakout

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S247

In the IP harness, approximately 21 cm (8 in) from the HVAC switch breakout, toward the instrument cluster breakout

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S254

In the IP harness, approximately 10 cm (4 in) from the park brake warning switch breakout, toward the datalink connector (DLC) breakout

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