The 2001 Cadillac Seville is available as a 4-door, 5-seat sedan. Starting at $41,935, the 2001 Cadillac Seville SLS is powered by a 4.6L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 27-mpg on the highway. The top of the line 2001 Cadillac Seville SLS w/TX7, priced at $42,485, is powered by a 4.6L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 27-mpg on the highway.