Commercial Chassis followed suit in downsizing. The professional car industry underwent a period of struggle, as multiple firms either closed their doors or were reorganized (such as Superior, Miller-Meteor and Hess & Eisenhardt). The final ambulances of the D-body Commercial Chassis were built in 1979. Following the discontinuation of the Cadillac Commercial chassis, the construction of coachbuilt professional cars has remained the same; a rolling chassis is bodied aft of the dashboard. On an official basis, Cadillac has produced "incomplete"-bodied versions of several of its unibody-chassis product lines, including the DeVille, DTS, XTS, and CT6. Additionally, the Cadillac Escalade ESV (based on the Chevrolet Suburban) is used for funeral-coach applications. With the closure of the Oshawa assembly plant and subsequent demise of the Cadillac XTS platform, Cadillac is using the XT5 and XT6 SUV chassis for hearses, starting in 2020. Legacy The Cadillac Commercial Chassis is perhaps most famous as the basis for the Ectomobile in the 1984 film Ghostbusters and its sequels, Ghostbusters II (1989) and Ghostbusters: Afterlife (2021). Sources "Classic American Ambulances: 1900-1979 Photo Archive," by Walt McCall and Tom McPherson External links Cadillac Commercial Chassis database with additional photos Cadillac Master Coachbuilders Commercial Chassis Rear-wheel-drive vehicles