The 1999 Chevrolet Monte Carlo is available as a 2-door, 5-seat coupe. Starting at $18,615, the 1999 Chevrolet Monte Carlo LS is powered by a 3.1L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway. The top of the line 1999ChevroletMonte CarloBase , priced at $ 20,635 , is powered by a 3.8L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 30-mpg on the highway.