The 2005 Cadillac DeVille is available as a 2-door, 3-seat hearse. Starting at $46,045, the 2005 Cadillac DeVille Base is powered by a 4.6LL , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway. The top of the line 2005CadillacDeVilleFuneral Coach , priced at $ 42,875 , is powered by a 4.6LL , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 20-mpg on the highway.