The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.
Resources for the Repair and Maintenance of your 2003 Pontiac Grand Prix
2003 Pontiac Grand Prix
2003 Pontiac Grand Prix Problems
The fuel pump may fail causing engine to stall and not restart.
The mass air flow or crankshaft position sensor may fail causing the engine to intermittently stall. It may be necessary for the engine to cool down before it will restart.
You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be completely flushed.
The water pump may develop a coolant leak resulting in an engine overheating condition.
2003 Pontiac Grand Prix Recalls (Recent)
Summary: GM IS RECALLING 207,542 MY 1997-2003 BUICK REGAL AND PONTIAC GRAND PRIX VEHICLES EQUIPPED WITH A 3.8L SUPERCHARGED V-6 ENGINE. THESE VEHICLES HAVE HIGHER FRONT ROCKER COVER GASKET TEMPERATURES, CREATING THE POTENTIAL FOR EARLIER DEGRADATION OF THE FRONT ROCKER COVER GASKET AND EVENTUAL OIL SEEPAGE.Learn more »
Summary: GENERAL MOTORS IS RECALLING 1,497,516 MY 1997-2003 BUICK REGAL, MY 1998-2003 CHEVROLET LUMINA, MONTE CARLO AND IMPALA, MY 1998-1999 OLDSMOBILE INTRIGUE, MY 1997-2003 PONTIAC GRAND PRIX VEHICLES EQUIPPED WITH A 3.8L V6 NATURALLY ASPIRATED ENGINE. SOME OF THESE VEHICLES HAVE A CONDITION IN WHICH DROPS OF ENGINE OIL MAY BE DEPOSITED ON THE EXHAUST MANIFOLD THROUGH HARD BRAKING.Learn more »
2003 Pontiac Grand Prix Questions and Answers
None of the passenger windows will go up or down. I've pressed the lockout button on the driver side both up and down and nothing happens. Could the switch be stuck? Is there a way to free ...
what would cause my 2003 pontiac grand prix to shift hard.And other times it shifts fine or it will be sluggish or slips or something.Please any suggestions would be great.
The moonroof on the car was left open during a rain, now the AC will only sometimes work and when it does work it will only do so with the fan on high. The radio display will not work, though it w...
I was told changing the blower motor resistor was easy, so I bought the part to fix it myself. I wanted to make sure I get this right; how do I get to the blower motor to change the resistor?