(16 model years) 1977 – 1992 CADILLAC FLEETWOOD BROUGHAM SEDAN, PICTURE A. These full-size Cadillacs introduced for 1977 were the first American luxury cars to be downsized for a changing world. While losing a foot in length, the ’77 model’s boxier shape allowed virtually similar interior room to the ’76. Here a 1978 model is shown.