In 1985, Fleetwood models used a new front wheel drive C-body platform, sharing the 110.8 inches (2,810 mm) wheelbase with GM's other C-body cars, the DeVille, Buick Electra, and Oldsmobile Ninety-Eight.[11] The Fleetwood Broughamcontinued to use the RWD platform, (which was redesignated as "D-body" for 1985) through 1986.

As had been the case since the 1977 model year, there were little more than trim differences between the Fleetwood and the DeVille. For 1985, the Fleetwood was actually a de Ville trim option, rather than a separate model. The optional d'Elegancepackage, added tufted-button seating among other niceties for the FWD Fleetwood sedan. The Fleetwood coupe had been dropped after the 1986 model year, but returned in 1989. The Fleetwood coupe for 1989 - 1992 was not popular with model year production in 1989: 4,108, 1990: 2,438, 1991: 894, and for 1992: a mere 443.