The 2001 Pontiac Grand Prix is available as a 4-door, 5-seat sedan. Starting at $21,960, the 2001 Pontiac Grand Prix GT Coupe is powered by a 3.8L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 30-mpg on the highway. The top of the line 2001PontiacGrand PrixGTP Sedan , priced at $ 25,630 , is powered by a 3.8L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 28-mpg on the highway.