GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Cargo Door Contactor, Left Side

On the rear body opening and the door, on the upper left side

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Cargo Door Contactor, Right Side

On the rear body opening and the door, on the upper right side

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Convenience Center

Under the right side of the IP, on the bulkhead

Power and Grounding Component Views

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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

Data Link Communications Connector End Views

Door Jamb Switch, Cargo

At the rear body opening, part of the right rear cargo door contactor

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Jamb Switch, Left Front

At the left end of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Jamb Switch, Left Rear

At the center inside edge of the left side B Pillar

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Jamb Switch, Right Front

At the right end of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Jamb Switch, Right Rear

At the center inside edge of the right side B pillar

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Lock Control Module

At the left C-Pillar

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Door Lock Motor, Cargo

Inside the right rear door, at the lower right corner

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Door Lock Motor, Left Front

Inside the left front door, part of the door handle

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Door Lock Motor, Left Rear

Inside the left rear door, part of the door handle

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Door Lock Motor, Right Front

Inside the right front door, part of the door handle

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Door Lock Motor, Right Rear

Inside the right rear door, part of the door handle

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Door Lock Relay

Under the center of the IP, near the remote control door lock receiver

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Door Lock Switch, Rear

On top of the right D pillar

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Door Lock Switch, Left Front

On the left front door trim panel, below the inside door handle

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Door Lock Switch, Right Front

On the right front door trim panel, below the inside door handle

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Headlamp and Panel Dimmer Switch

Upper RH side of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Horn Relay

In the underhood fuse block

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Horn Switch

At the top of the steering column, under the steering wheel pad

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IP Fuse Block

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

Power and Grounding Component Views

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Liftgate Release Motor

In the right center of the liftgate

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Park/Neutral Position (PNP) Switch

At LH center of the transmission

Transfer Case Control Component Views

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Remote Control Door Lock Receiver

Under the IP, inside the right of the right steering column support bracket

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Underhood Fuse Block

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

Power and Grounding Component Views

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C100

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

Harness Routing Views

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C200

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

Harness Routing Views

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C209

Inside the lower right side A-pillar

Harness Routing Views

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C213

Inside the lower right side A-pillar

Harness Routing Views

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C266

Part of the IP harness to steering column harness, to the left side of the steering column, near the bulkhead

Harness Routing Views

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C298

Behind the right side of the IP, near the convenience center

Harness Routing Views

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C299

Behind RH of IP, above HVAC evaporator, housing

Harness Routing Views

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C301

At the left front kick panel

Harness Routing Views

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C302

At the LF kick panel

Harness Routing Views

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C314 (Suburban/Utility)

On the left D-pillar behind the trim cover

Harness Routing Views

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C450 (Suburban/Utility)

Center rear of the vehicle under the floor between P409 and P410

Harness Routing Views

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C497

In the right side B-pillar

Harness Routing Views

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C499

In the left side B-pillar

Harness Routing Views

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G105 (Gas)

On the right front side of the engine block

Power and Grounding Component Views

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G105 (Diesel)

Left rear of the intake manifold

Power and Grounding Component Views

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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

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G202

On the right side of the instrument panel, mounted to the HVAC plenum bracket

Power and Grounding Component Views

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G400 (Utility/Suburban)

On the right side B-pillar, near the door striker

Power and Grounding Component Views

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P101

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

Harness Routing Views

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P500

At the left front door

Harness Routing Views

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P600

At the right front door

Harness Routing Views

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P700

At the left rear door

Harness Routing Views

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P800

At the right rear door

Harness Routing Views

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S107 (Gas)

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

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S107 (6.5L, HD

Engine harness, approximately 40 cm (15 in) from EBCM breakout, toward Transmission harness breakout

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S107 (7.4L)

Engine harness, approximately 18 cm (7 in) from EBCM breakout, toward tthe EGR harness breakout

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S140

Engine jumper harness, approximately 37 cm (8.5 in) from the intake air temperature (IAT) sensor, toward the engine harness

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S147 (Gas)

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

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S147 (Diesel)

Engine harness, approximately 3 cm (1 in) from the A/C compressor cycling 5W breakout, toward the transmission breakout

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S162 (Gas)

Engine harness, approximately 17 cm (6.5 in) from starter solenoid breakout, toward LH oxygen sensor breakout

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S162 (7.4L)

Engine harness, approximately 15 cm (6 in) from RH bank oxygen sensor breakout, toward starter solenoid breakout

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S204

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

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S208 (Gas)

IP harness, approximately 10 cm (4 in) from the temperature actuator breakout, toward the inflation restraint module breakout

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S208 (Diesel)

IP harness, approximately 12 cm (5 in) from the inflatable restraint breakout, toward the courtesy lamp breakout

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S213

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

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S218

IP harness, approximately 16 cm (6 in) from the radio connector breakout, towards the IP compartment LP breakout

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S251 (Utility)

Crossbody harness, approximately 14 cm (5.5 in) from the C210 breakout, toward the RH door harness

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S251 (Suburban)

Crossbody harness, approximately 13 cm (5 in) from LF Door harness breakout, toward IP harness breakout

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S255(Suburban)

Crossbody Harness, approximately 30 cm 12 in) from the IP harness breakout, toward the seat belt switch harness breakout

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S255 (Utility)

Crossbody harness, approximately 11 cm (4 in) from the IP harness breakout, toward the door lock relay breakout

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S256 (Pickup/Extended Cab)

Crossbody harness, approximately 12 cm (4.5 in) from C210 breakout, toward LH Seat harness breakout

Harness Routing Views

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S256 (Suburban)

Crossbody harness, approximately 30 cm (12 in) from the IP harness breakout, toward the seat belt switch harness beakout

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S256 (Crew Cab)

Crossbody harness, approximately 1 cm (0.5 in) before door lock relay breakout, toward the LH Seat harness breakout

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S256 (Utility)

Crossbody harness, approximately 12 cm (5 in) from the C210 breakout, toward the IP harness breakout

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S257

Crossbody harness, approximately 10 cm (4 in) from the IP harness breakout, toward the seat belt switch harness breakout

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S257 (Pickup/Extended Cab

Crossbody harness, approximately 5 cm (2 in) from C231 breakout, toward IP harness breakout

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S257 (Suburban/Utility

Crossbody harness, approximately 5 cm (2 in) from C231 breakout, toward door lock relay breakout

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S258 (Suburban)

Crossbody harness, approximately 17 cm (6.5 in) from the IP harness breakout, toward the power amplifier breakout

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S258 (Utility)

Crossbody harness, approximately 25 cm (10 in) from the seat belt switch harness breakout, toward the LH door harness breakout

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S259

Crossbody harness, approximately 11 cm (4 in) into seat belt switch harness, toward C212

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S261

Crossbody harness, approximately 12 cm (4.5 in) from seat belt switch breakout, toward LH door harness breakout

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S262 (Crew Cab)

Crossbody harness, approximately 19 cm (7.5 in) from seat belt switch breakout, toward IP harness breakout

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S262

Crossbody harness, approximately 19 cm (7 in) from the seat belt switch breakout, toward the LH door harness breakout

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S264

IP harness, approximately 2 cm (1 in) from the DLC breakout, toward the instrument cluster breakout

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S265 (Suburban)

Crossbody harness, approximately 7 cm (3 in) from the LH seat harness breakout, towards the RH, RR door harness breakout

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S265 (Utility)

Crossbody harness, approximately 2 cm (1 in) from the seat belt switch harness breakout, toward the IP harness breakout

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S431 (Utility w/Cargo Doors)

Front-to-rear body harness, approximately 7 cm (2.5 in) from rear dome lamp harness breakout, toward rear window defogger breakout

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S431 (4-Door Utility/Suburban w/Rear Heat)

Front-to-rear body harness, approximately 7 cm (2.5 in) from rear window defogger harness breakout, toward LR speaker breakout

Harness Routing Views

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S431 (Utility w/ Endgate)

Front-to-rear body harness, at the CHMSL breakout

Harness Routing Views

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S431 (Suburban w/ Cargo Doors, RR HEat and A/C)

Front-to-rear body harness, approx, 6 cm (2 in) From the rear window defogger breakout, toward the LH speaker breakout

Harness Routing Views

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S432 (Utility w/Cargo doors)

Front-to-rear body harness, approximately 7 cm (2.5 in) from LH door speaker breakout, toward rear window defogger switch breakout

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S432 (4-Door Utility/Suburban w/o C69

Front-to-rear body harness, in crossbody harness breakout, approximately 140 cm (55 in) from C301 breakout

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S432 (4-Door Utility/Suburban w/o Rear heat

Front-to-rear body harness, in crossbody harness breakout, approximately 13 cm (5 in) from C232 breakout

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S432 (Suburban w/ Cargo Doors, Rear Heat and A/C)

Front-to-rear body harness, approximately 7 cm (2.5 in) from rear dome lamp harness breakout, toward the rear window defogger breakout

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S434 (2-Door Utility)

Front-to-rear body harness, approximately 7 cm (2.5 in) from front dome lamp breakout, toward crossbody harness breakout

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S434 (Utility/Suburban w/ Cargo Doors)

Front-to-rear body harness, approximately 7 cm (3 in) before the rear dome lamp harness breakout, towards C301

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S434 (Suburban w/ Cargo Doors

Front-to-rear body harness, approximately 35 cm (14 in) from the rear dome lamp breakout, towards C301

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