General Motors C platform (1925)

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The GM C Platform was a rear wheel drive (RWD) automobile chassis used by General Motors for its full-sized cars from 1925 through 1984. From at least 1941, when the B-body followed suit in adopting the C-body's pioneering lower and wider bodystyle with no running boards, it may be viewed as a larger and more upscale version of the GM B platform. It was also related to the limousine D platform. With the introduction of a severely downsized front-wheel drive new GM C platform in 1985 it was redesignated as GM's D platform and continued in production for a number of Cadillac models through 1996.

GM C platform (RWD)
1977 Cadillac Coupe Deville (01).jpg
1977 Cadillac Coupe Deville
ManufacturerGeneral Motors
Body and chassis
ClassFull-size car
LayoutFR layout
RelatedGM D platform
GM B platform

Among the earlier models the C-body was used for were the Pontiac Series 24/29 Torpedo, Oldsmobile 98, the Buick Roadmaster, Super and 1958 Limited, the LaSalle Series 52, and all mid-level Cadillacs starting with the Cadillac Series 355.

Generally the C-Body was for the top-of-the-line models of multiple General Motors divisions including the Oldsmobile 98 and Buick Electra, and the base model for multiple Cadillacs, including the Series 6200 Calais, the Series 6300 de Ville, the Series 6400 Eldorado, the Series 6000 Fleetwood Sixty Special and the Fleetwood Brougham.


Years Model Next platform
1925-1930 Cadillac Type V-63 -
1930-1935 Cadillac Series 355 -
1936 Cadillac Series 80 -
1936–1937 Cadillac Series 70 -
1937–1938 Cadillac Series 65 -
1940–1964 Cadillac Series 62 -
1942–1976 Cadillac Sixty Special (stretched for most of its existence) GM C platform (FWD)
1948–1950 Cadillac Series 61 -
1959–1966 Cadillac Eldorado GM E platform
1959–1984 Cadillac De Ville GM C platform (FWD)
1965–1976 Cadillac Calais -
1977–1984 Cadillac Fleetwood Brougham GM D platform (1985)
1940 LaSalle Series 52 -
1936–1958 Buick Roadmaster GM B platform
1940–1958 Buick Super -
1958 Buick Limited -
1959–1984 Buick Electra GM C platform (FWD)
1971–1976 Buick Estate GM B platform
1940–1984 Oldsmobile 90, 96 and 98 GM C platform (FWD)
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/Kingswood/Kingswood Estate GM B platform