The fifth-generation Chevrolet Impala were full-sized automobiles produced by Chevrolet for the 1971 through 1976 model years and was one of GM's top-selling models throughout the 1970s. Models included a sport coupe using a semi-fastback roofline shared with other B-body GM cars, custom coupe with the formal roofline from the Caprice, four-door sedan, four-door hardtop sport sedan, and a convertible, - each of which rode on a new 121.5-inch wheelbase and measured 217 inches overall. Station wagons rode on a longer 125-inch wheelbase.