General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 1997-2003 model year Buick Regal and Pontiac Grand Prix, 1998-1999 model year Chevrolet Lumina and Oldsmobile Intrigue, 1998-2003 model year Chevrolet Monte Carlo, and 2000-2003 model year Chevrolet Impala model vehicles, equipped with a 3.8L V6 naturally