2003 Pontiac Bonneville Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Pontiac Bonneville
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2003 Pontiac Bonneville ProblemsMode/Temperature Door Actuators May Fail
The mode and temperature door actuators may fail causing improper air flow or temperature output from the heating and AC (HVAC) system.
The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.
2003 Pontiac Bonneville Questionshow to reset service engine light (1 answer)
I've had several people look at it. Not the oil, not a piston. Two people said could be a broke flywheel but my car still starts and drives. They also said the noise is not coming from the engine. The other two people said it's the motor and I'm out of a car. Any ideas what this could...
2003 Pontiac Bonneville RecallsGM Recalls 2002-2003 Vehicles Due to Fuel Tank Pressure Sensor Failure
GM recalls certain 2002-2003 Cadillac Devillle, Seville, Oldsmobile Aurora, and Pontiac Bonneville vehicles because the fuel tank pressure sensor may fail and cause a fuel leak. In the presence of an ignition source, a fuel leak may result in a fire. Dealers will replace the fuel tank pressure sensor.