The Cadillac DeVille was originally a trim level and later a separate model produced by Cadillac. The first car to bear the name was the 1949 Coupe de Ville, a prestige trim level of the Series 62 luxury coupe.
@juniordog1 sounds to me like your Cadillac is having issues with either the window regulator or the electrical motor. Use the attached part of a repair manual to check on those things. Cadillac-Doors.pdf