GM C platform

The General Motors C platform (commonly called C-body) was an automobile platform designation used for full sized luxury cars until 2005.

Rear wheel drive

GM C platform (RWD)

1941 Buick Roadmaster
Manufacturer General Motors
Production 1940–1984
Class Full-size car

The rear-wheel drive C Platform designation had been introduced as early as 1940 and was used until 1984. From at least 1941, when the B-body followed suit in adopting the C-body's pioneering lower and wider runningboardless bodystyle, it may be viewed as a stretched version of the GM B platform. After 1984, the platform was renamed the GM D platform and continued in production to 1996.

This platform was the basis for the following vehicles:

Years Model Next platform
1940–1964 Cadillac Series 62
1942–1976 Cadillac Sixty Special (stretched for much of its existence)
1948–1950 Cadillac Series 61
1959–1966 Cadillac Eldorado GM E platform
1959–1984 Cadillac De Ville FWD C Platform
1965–1976 Cadillac Calais
1977–1984 Cadillac Fleetwood Brougham GM D platform
1940–1958 Buick Roadmaster, Super, and 1958 Limited
1946–1953 Buick Roadmaster Estate, and Super Estate
1959–1984 Buick Electra FWD C Platform
1971-1976 Buick Estate GM B platform
1940–1984 Oldsmobile 90, 96 and 98 FWD C Platform
1971-1976 Oldsmobile Custom Cruiser GM B platform
1940–1941 Pontiac Series 24/29 Torpedo
1971-1976 full-sized Pontiac Safari, and Pontiac Grand Safari GM B platform
1971-1976 Chevrolet Townsman, Brookwood/Bel Air, Kingswood/Impala, and Kingswood Estate/Caprice wagons GM B platform

Front wheel drive

GM C platform (FWD)

1997-2002 Buick Park Avenue
Manufacturer General Motors
Production 1985–2005
Class Full-size car

From 1985 onwards, the C-body designation was used for front-wheel drive luxury cars. The platform was similar to the H platform, with both sharing the same 110.8 in wheelbase. Most C-body vehicles were replaced with cars on the related G, H, and K platform designations.

The Cadillac Series 75 briefly made its return on this platform, stretched by 23.6" to a wheelbase of 134.4".

This platform was the basis for the following vehicles:

Years Model Next platform
1985–1987 Cadillac Series 75 -
1985–1993 Cadillac Fleetwood, and Sixty Special GM D platform
1985–1993 Cadillac De Ville GM K platform (FWD)
1985–1990 Buick Electra -
1991–2005 Buick Park Avenue -
1985–1996 Oldsmobile 98 -