The intake manifold gaskets can develop external engine oil or coolant leaks. The intake manifold will need to be removed and the gaskets replaced to correct this issue. In some cases the plastic intake manifold my be damaged requiring replacement.
Resources for the Repair and Maintenance of your 2003 Pontiac Bonneville
2003 Pontiac Bonneville
2003 Pontiac Bonneville Problems
The mass air flow or crankshaft position sensor may fail causing the engine to stall intermittently. Proper diagnoses will be necessary to determine the cause of any stalling condition.
The mode and temperature door actuators may fail causing improper air flow or temperature output from the heating and AC (HVAC) system.
The water pump may develop a coolant leak resulting in an engine overheating condition.
The steering may develop a clunk type noise from the upper intermediate steering shaft. Our technicians tell us that you should check with you local GM dealer to find out what the latest repair is for this condition.
2003 Pontiac Bonneville Recalls (Recent)
Summary: CERTAIN PASSENGER, MINI VANS, AND SPORT UTILITY VEHICLES HAVE AN AIR BAG INFLATOR ON THE DRIVER'S SIDE THAT COULD FRACTURE AT A WELD DURING A DEPLOYMENT.Learn more »
RepairPal Expert Overview:
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.
2003 Pontiac Bonneville Questions and Answers
Where is the interior fuse box for inside lights.
my service air bag light stays on all the time, i had it plugged into a small diagnostic handheld computer and it said it wasn't connected how do i fix this and is it expensive?
front driver side brake grinding metal to metal and one rotor.
usually the noise occurs when it warms up and when i press brakes going downhill or a sudden stop sign.
2003 Pontiac Bonneville Reviews
This is my second Bonneville, first in 1984. Nice sturdy vehicle.interior is adequate comfortable. Good solid brake system. Transmission went out at 90,000 miles. Ok except for the computer system which has problems. Smooth running. Replaced the serpentine belt at approx 90,000 miles. Replaced the catalytic converter & exhaust system at 140,000. Heating & A/C run great, no problems so far. Suspension is great, power steering rack went bad, have to add fluid periodically. Overall, a very reliable vehicle..
This is my 3rd bonneville. I started with the 94. All have been the ssei (super charger). The 94 definitly had the most power! I think they must have later, put a govener on them. On my 2000 and 2003 I have had repeated problems with the steering. It clunks and grinds. They have a defective part in them that you can replace, but it eventually does the same thing with the new part. They have a bad front end design. The seat heater went out in the 2000 and the 03. The car looks good, rides great, has good performance, but definitly has mechanical issues. Also had a leak in the intake manifold, ended up installing a new crank and bearing. Guess its a common problem with these.