After nearly four war years in which no civilian passenger cars had been produced, Detroit could have sold anything with wheels that went round and round. Chevrolet, along with most of its competitors, shrewdly elected to serve up existing models. After all, the paid-for factory tooling was already in place, and the demand for new cars was unprecedented.The 1946, 1947, and 1948 Chevrolet Stylemaster, Fleetmaster, and Fleetline were warmed-over versions of 1942 cars, but that hardly mattered to a car-hungry public.