The 2004 Pontiac Montana is available as a 4-door, 7-seat passenger van. Starting at $25,885, the 2004 Pontiac Montana w/1SA FWD Extended Passenger is powered by a 3.4L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway. The top of the line 2004PontiacMontanaAWD Extended Passenger , priced at $ 31,035 , is powered by a 3.4L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway.