GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Convenience Center

Under the left side of the IP, on the bulkhead

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Heated Seat Element, LF

Inside the Left Front Seat Cushion

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Element, RF

Inside the Right Front Seat Cushion

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Element, LR

Inside the Left Rear Seat Cushion

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Element, RR

Inside the Right Rear Seat Cushion

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Module LF

Under the LF power seat

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Module, LR

Under the LR power seat

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Module, RF

Under the RF power seat

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Module, RR

Under the RR power seat

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Switch, LF

At the LF of the LF power seat

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Switch LR

In the back LR of the center console

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Switch, RF

At the RF of the RF power seat

Power Seat Component Views

Power Seat Connector End Views

Heated Seat Switch, RR

In the back RR of the center console

Power Seat Component Views

Power Seat Connector End Views

IP Fuse Block

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

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Power Seat Adjuster Switch LH

In the LF seat, on the bottom, mounted to the frame

Power Seat Component Views

Power Seat Connector End Views

Power Seat Adjuster Switch, RH

In the RF seat, on the bottom, mounted to the frame

Power Seat Component Views

Power Seat Connector End Views

Power Seat Forward/Rearward Motor

Under the driver's seat

Power Seat Component Views

Power Seat Connector End Views

Power Seat Front Tilt Motor

In the lower left of the left front seat

Power Seat Component Views

Power Seat Connector End Views

Power Seat Front Tilt Switch

On the lower left of the left front seat

Power Seat Component Views

Power Seat Connector End Views

Power Seat Lumbar Motor, Left Front

Under the left front seat, mounted to the seat frame

Power Seat Component Views

Power Seat Connector End Views

Power Seat Lumbar Motor, Right Front

Under the right front seat, mounted to the seat frame

Power Seat Component Views

Power Seat Connector End Views

Power Seat Lumbar Switch, Left Front

On the lower left front of the left front seat

Power Seat Component Views

Power Seat Connector End Views

Power Seat Lumbar Switch, Right Front

On the lower right front of the right front seat

Power Seat Component Views

Power Seat Connector End Views

Power Seat Rear Tilt Motor

In the lower left of the left front seat

Power Seat Component Views

Power Seat Connector End Views

Power Seat Rear Tilt Switch

On the lower left of the left front seat

Power Seat Component Views

Power Seat Connector End Views

Seat Belt Switch, LR

Inside the Left Rear Seat Belt Buckle

Power Seat Component Views

Power Seat Connector End Views

Seat Belt Switch, RF

Inside the Right Front Seat Belt Buckle

Power Seat Component Views

Power Seat Connector End Views

Seat Belt Switch, RR

Inside the Right Rear Seat Belt Buckle

Power Seat Component Views

Power Seat Connector End Views

Underhood Fuse Block

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

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

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

C210

At the convenience center

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C212

Under the left front seat

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C228

Part of the crossbody harness to the right front seat belt switch, under the right front seat

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C229

Part of the crossbody harness to the right front power seat, under the right front seat

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C236

In the left front seat harness, approx. 30 cm (12 in)

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C237

In the right front seat harness, approx. 30 cm (12 in)

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C298

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C304 (Luxury)

IP harness, Inline to Floor Console harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C305 (Luxury)

Cross Body harness, Inline to Floor Console harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C310

Under RH heated seat

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C311

Under LH heated seat

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C320

Under LH Seat (Split Bench or Bucket)

--

Inline Harness Connector End Views in Wiring Systems

C321

Under LH Seat (Split Bench or Bucket)

--

Inline Harness Connector End Views in Wiring Systems

C322

Under RH Seat (Split Bench or Bucket)

--

Inline Harness Connector End Views in Wiring Systems

C323

Under RH Seat (Split Bench or Bucket)

--

Inline Harness Connector End Views in Wiring Systems

C324

Under LH Side of Bench Seat

--

Inline Harness Connector End Views in Wiring Systems

C325

Under LH Side of Bench Seat

--

Inline Harness Connector End Views in Wiring Systems

C326

Under RH Side of Bench Seat

--

Inline Harness Connector End Views in Wiring Systems

C327

Under RH Side of Bench Seat

--

Inline Harness Connector End Views in Wiring Systems

G202

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

Power and Grounding Component Views in Wiring Systems

--

S210 (Diesel)

IP harness, approx. 14 cm (5.5 in) from steering column harness breakout

--

--

S210 (Gas)

IP harness, approx. 4 cm (1.5 in) from auxiliary power outlet breakout

--

--

S227

LF seat harness, approx. 5 cm (2 in) from power seat lumbar switch breakout

--

--

S228

RF seat harness, approx. 5 cm (2 in) from power seat lumbar switch breakout

--

--

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

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

--

--

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

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

--

--

S232 (7.4L)

Engine harness, approx. 4 cm (1.5 in) into EGR valve breakout

--

--

S237

RF seat harness, approx. 4 cm (1.5 in) from power seat lumbar switch breakout

--

--

S238

Crossbody harness, approx. 26 cm (10 in) into the LH Seat harness breakout

--

--

S241

LF seat harness, approx. 4 cm (1.5 in) from power seat lumbar

--

--

S247

Crossbody harness, approx. 6 cm (2.5 in) into LH door harness breakout

--

--

S255

Crossbody Harness, approx. 20 cm (8 in) from C210 breakout, toward the LH Seat harness breakout

--

--

S256 (Pickup/Extended Cab)

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

--

--

S256 (Utility/ Suburban)

crossbody harness, approx. 11 cm (4 in) from C210 breakout, toward the LH Seat harness breakout

--

--

S256 (Crew Cab)

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

--

--

S259

Crossbody harness, approx. 7 cm (2.5 in) into seat belt switch harness, toward C212

--

--

S264

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

--

--

S273

LH heated seat harness, approx. 10 cm (4 in) from heated seat control module breakout

--

--

S274

RH heated Seat harness, approx. 10 cm (4 in) from heated seat control module breakout

--

--

S277

LH seat harness, approx. 5 cm (2 in) from heated seat control module breakout

--

--

S278 (4-Door Utility Suburban)

Crossbody harness, approx. 32 cm (12.5 in) from C210 breakout, toward C298 breakout

--

--

S281

Crossbody harness approx. 70 cm (24.5 in) from RH heated seat breakout

--

--

S310 (4-Door Utility)

Front-to-rear body harness approx. 5 cm (2 in) from auxiliary HVAC fan switch breakout

--

--

S330

Floor console harness approx. 13 cm (5 in) from LH heated seat switch breakout

--

--

S332

Floor console harness approx 28 cm (11 in) from LH heated seat switch breakout

--

--

S333

Floor console harness approx. 12 cm (4.5 in) from CD player harness breakout

--

--

S337

LH rear heated 150

--

--

S339

LH rear heated 182

--

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