The 2011 Cadillac DTS is available as a 4-door, 5-seat sedan. Starting at $46,680, the 2011 Cadillac DTS Base Sedan w/1SA is powered by a 4.6L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway. The top of the line 2011CadillacDTSLight Funeral Coach/Hearse Livery , priced at $ 47,410 , is powered by a 4.6L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway.