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 MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 108 (SEAT HEATING SYSTEM AND SEAT COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESFRONT HEATED SEAT MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
Circuit/System Verification
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify that no heated seat DTCs are set.
- If any heated seat DTC is set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no heated seat DTCs are set
- If any heated seat DTC is set
- Engine ON.
- Verify the scan tool Front Seat Heating Control Module Driver Seat Heating/Venting/Cooling Mode parameter changes between Off and Back & Cushion Heat after pressing the driver heated seat switch.
- If the parameter does not change
Replace the K33 HVAC Control Module.
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify the scan tool Passenger Front Seat Heating/Venting/Cooling Mode Switch parameter changes between Off and Back & Cushion Heat after pressing the passenger heated seat switch.
- If the parameter does not change
Replace the K33 HVAC Control Module.
- Go to next step: If the parameter changes
- If the parameter does not change
- Replace the K29F Seat Heating Control Module - Front.
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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.