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 MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 297 (POWER SEATS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1335CIRCUIT/SYSTEM TESTING
2008 Pontiac Grand Prix Base
Circuit/System Testing
2008 Pontiac Grand Prix BaseSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
- Use a scan tool to clear the current and history diagnostic trouble code.
- Ignition ON, while observing the scan tool for DTCs, operate the seat adjuster switch in both directions for each directional motor.
- Disconnect the suspect seat motor for which the DTC set.
- Clear the current and history diagnostic trouble code.
- While observing the scan tool for DTCs, operate the suspect seat motor adjuster switch in both directions.
- If the DTC set current or history, test the motor control circuits for a short to ground, or an open/high resistance. If the circuits test normal, replace the memory seat module.
- If all circuits/connections test normal, replace the seat motor.
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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.