There are 3 owner-reported fuel system complaints for the 2003 Pontiac Grand Prixin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
2003 GRAND PRIX 3800 SERIS II ENGINE COMPARTMENT FIRES I FOUND THAT THE CONNECTION FROM THE FUEL SUPPLY LINE TO THE FUEL RAIL FAILS WHEN ENGINE IS TURNED OFF THIS POOLS UP BY THE INJECTORS AFTER THE OWNERS ARE WELL AWAY FROM THE CAR. THERE IS A WEB SITE WWW.EDMUNDS.COM THAT TALKS OF A OIL LEAK FROM THE SUPERCHARGER, I THINK A CLOSER LOOK AT THE FUEL CONNECTION IS THE PLACE THE FIRES ARE COMING FROM. *TR
TL*THE CONTACT OWNS A 2003 PONTIAC GRAND PRIX. DURING ROUTINE MAINTENANCE, THE MECHANIC DISCOVERED THAT THERE WAS ONLY A PIECE OF PLASTIC USED TO CLOSE THE ETR VALVE AT THE FUEL INJECTOR RAIL. THIS IS WHERE THE FUEL LINE CONNECTS WITH THE MOTOR. THE FAILURE CAUSES THE GASKET TO OVERHEAT, AND COULD LEAD TO AN ENGINE FIRE DUE TO FUEL LEAKING INTO THE OVERHEATED MOTOR. THE CONTACT IS AFRAID TO DRIVE THE VEHICLE. THERE HAD BEEN NO FAILURE TO DATE.
IN FEB OF 2003 MY PONTIAC GRAND PRIX CAUGHT FIRE AFTER I PARKED FOR THE EVENING. SINCE THEN, INSURANCE REFUSED COVERAGE FOR "SUSPICIOUS IN NATURE. IN 2003 PONTIAC CLAIMED NO RESPONSIBILITY, GM'S 100,000 MILE WARRANTY WAS A REFUSED. AFTER COMPLAINING AGAIN IN 2006 PONTIAC CALLED AGAIN TO SAY THEY WERE NOT AT FAULT AND HAD NO RESPONSIBILITY. I ASKED THEM FOR CORRESPONDING VIN NUMBERS AND WAS REFUSED. I HAVE LOCATED OVER 15 ADDITIONAL GRAND PRIX ENGINE FIRES WHERE GM / PONTIAC IS CLAIMING NO RESPONSIBILITIES. ONCE ? TWICE ? 10 + ? I READ THAT NHTSA HAD BEGUN ANOTHER INVESTIGATION IN FEB 07 AND WOULD LIKE MORE INFORMATION ON THIS. I WOULD BE HAPPY TO FORWARD COPIES OF ANY OF MY MATERIALS INCLUDING 2 SEPARATE FIRE INVESTIGATIONS THAT CLAIM MY FIRE STARTED BY THE DRIVERS HEAD LAMP UNDER THE AIR FILTER ASSEMBLY, INCLUDING RECEIPTS THAT SHOW WHERE GM SERVICED MY FUEL ASSEMBLY 2 WEEKS PRIOR TO THE FIRE... *JB
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026