Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 90 (POWER SEAT SYSTEM)SYMPTOM TESTINGSEAT HEAT DOES NOT TURN OFF
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Seat Heat Does Not Turn Off
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Seat Heat Does Not Turn Off
WARNING: This page is about a different car, the 1998 Oldsmobile Aurora and 1998 Buick Riviera. However, it is still accessible from the selected car via links, so may be relevant.
- Perform HEATED SEATS SYSTEM CHECK under TROUBLE SHOOTING. Go to next step.
- Disconnect suspect component. For Aurora, disconnect suspect seat/lock switch in door panel. For Riviera, disconnect power mirror switch for driver's side, or heated seat switch for passenger's side. If seat cools down, go to step 6). If seat does not cool down, go to next step.
- Disconnect heated seat module connector C2. If seat cools down, go to step 7). If seat does not cool down, go to next step.
- Check for short to battery voltage in Black wire between heated seat module connector C2 terminal "A" and heated seatback. If circuit is okay, go to next step. If circuit is not okay, go to step 9).
- Replace heated seatback. See HEATED SEAT COMPONENTS under REMOVAL & INSTALLATION. Perform HEATED SEATS SYSTEM CHECK under TROUBLE SHOOTING.
- Replace suspect switch. For Aurora, suspect seat/lock switch is in door panel. On Riviera, replace power mirror switch on driver's door panel, or heated seat switch on passenger's door panel. See HEATED SEAT COMPONENTS under REMOVAL & INSTALLATION. Perform HEATED SEATS SYSTEM CHECK under TROUBLE SHOOTING.
- Check for short to ground in Light Blue wire between heated seat module connector C1 terminal "C" and switch. If circuit is okay, go to next step. If circuit is not okay, go to step 9).
- Replace heated seat module. See HEATED SEAT COMPONENTS under REMOVAL & INSTALLATION. Perform HEATED SEATS SYSTEM CHECK under TROUBLE SHOOTING.
- Repair suspect circuit. Perform HEATED SEATS SYSTEM CHECK under TROUBLE SHOOTING.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.