The 2012 Cadillac Escalade EXT is available as a 4-door, 5-seat sport utility. Starting at $63,060, the 2012 Cadillac Escalade EXT Base is powered by a 6.2L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 18-mpg on the highway. The top of the line 2012CadillacEscalade EXTPremium , priced at $ 69,640 , is powered by a 6.2L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 18-mpg on the highway.