The General Motors C platform (commonly called C-body) was an automobile platform

Automobile platform

An automobile platform is a shared set of common design, engineering, and production efforts, as well as major components over a number of outwardly distinct models and even types of automobiles, often from different, but related marques...

 designation used for full sized

Full-size car

A full-size car is a marketing term used in North America for an automobile larger than a mid-size car. In the United States, the EPA uses "large car" to denote full-size cars....

 luxury cars until 2005.

Rear wheel drive

The earliest reference to the C-body is with respect to the 1940 Pontiac Series 29 according to the "Standard Catalog of American Cars". The same book also lists the 1946 Oldsmobile 98s, Buick Supers and Roadmasters, and Cadillac Series 62s and 60 Specials as being built on the C-body.

1959-1984

The modern rear-wheel drive C Platform designation was introduced in 1959 and was used until 1984. It was an extended wheelbase

Wheelbase

In both road and rail vehicles, the wheelbase is the distance between the centers of the front and rear wheels.- Road :In automobiles, the wheelbase is the horizontal distance between the center of the front wheel and the center of the rear wheel...

 version of the GM B platform

GM B platform

The B platform, or B-body, was General Motors' full-size rear-wheel drive automobile platform. It was closely related to the C-body and D-body and was used for coupés, sedans, and station wagons....

. After 1984, the extended rear wheel drive platform was renamed to D platform

GM D platform

The D platform, or D-body was Cadillac's full-size rear wheel drive automobile platform designation, used until 1996. It was closely related to the GM B platform and C platform.All D-bodies were built in Arlington, Texas from 1988-1996 model years...

 and continued in production to 1996.

This platform was the basis for the following vehicles:

Years	Wheelbase	Model	Next platform
1959–1984		Buick Electra Buick Electra The Buick Electra was a full-size premium automobile built by the Buick division of General Motors. The Electra name was used by Buick between 1959 and 1990.- 1959–1960 :...	FWD C Platform
1959–1984		Cadillac Calais Cadillac Calais The Calais was a full-size luxury car made by Cadillac from 1965 to 1976. For 1965, Cadillac renamed the entry-level Series 62 the Calais, after the French town and resort which overlooks the narrowest point in the English Channel, and from which the White Cliffs of Dover can easily be seen on a... , Series 62 Cadillac Series 62 The Series 62 was a series of cars produced by Cadillac, designed to replace the Series 61 in 1940. It remained in production through 1964, having been renamed Series 6200, when it was replaced by the Cadillac Calais name.-1940–1941:... , DeVille Cadillac DeVille The de Ville was originally a trim level and later a model of General Motors' Cadillac marque. The first car to bear the name was the 1949 Coupe de Ville, a prestige trim level of the Series 62 luxury coupe. The last model to be formally known as a de Ville was the 2005 Cadillac Deville, a... , and Fleetwood Cadillac Fleetwood Lawrence P. Fisher was the Fisher brother most closely involved with Cadillac in its early years. In 1916 he joined the Fisher Body Company which had been formed by two of his brothers in 1908. Larry was one of four of the seven Fisher brothers who brought Fisher Body Corporation under the General...	FWD C Platform
1959–1966		Cadillac Eldorado Cadillac Eldorado The 1953 Eldorado was a special-bodied, low-production convertible . It was the production version of the 1952 El Dorado "Golden Anniversary" concept car, and borrowed bumper bullets from the 1951 GM Le Sabre show car...	GM E platform GM E platform The General Motors E platform or E-Body was the automobile platform designation used for a number of personal luxury cars produced from 1963 to 2002...
1959–1984		Cadillac Fleetwood Brougham Cadillac Fleetwood Brougham Lawrence P. Fisher was the Fisher brother most closely involved with Cadillac in its early years. In 1916 he joined the Fisher Body Company which had been formed by two of his brothers in 1908. Larry was one of four of the seven Fisher brothers who brought Fisher Body Corporation under the General...	GM D platform GM D platform The D platform, or D-body was Cadillac's full-size rear wheel drive automobile platform designation, used until 1996. It was closely related to the GM B platform and C platform.All D-bodies were built in Arlington, Texas from 1988-1996 model years...
1965–1984		Oldsmobile 98 Oldsmobile 98 The Oldsmobile 98 was a full-size automobile and the flagship model of the Oldsmobile division of General Motors. The name first appeared in 1941 and was used again after American consumer automobile production resumed post-World War II...	FWD C Platform

Front wheel drive

From 1985 onwards, the C-body designation was used for front-wheel drive

Front-wheel drive

Front-wheel drive is a form of engine/transmission layout used in motor vehicles, where the engine drives the front wheels only. Most modern front-wheel drive vehicles feature a transverse engine, rather than the conventional longitudinal engine arrangement generally found in rear-wheel drive and...

 luxury cars. The platform was similar to the H platform

GM H platform

The H Platform, or H-body, name has been used twice by General Motors. The 1970s H-body was an inexpensive rear-wheel drive compact automobile platform from the 1970s, used for the Chevrolet Vega and Monza and their derivatives...

, with both sharing the same 110.8 in wheelbase. Most C-body vehicles were replaced with cars on the related G

GM G platform (FWD)

The General Motors G platform automobile platform designation was used for front-wheel drive full-sized luxury cars between 1995 and 2003. It is related to the C, H, and K platforms....

, H

GM H platform (FWD)

The H platform, or H-body designates a General Motors front wheel drive full-sized automobile platform beginning in 1986. It is related to the C, G and K platforms.Previously the H platform designation was used for unrelated rear-wheel drive compact cars....

, and K

GM K platform (FWD)

The General Motors K platform was an automobile platform designation used for front wheel drive Cadillac models beginning in 1980. It replaced the rear wheel drive K platform....

 platform designations.

This platform was the basis for the following vehicles:

Years	Wheelbase	Model	Next platform
1985–1990		Buick Electra Buick Electra The Buick Electra was a full-size premium automobile built by the Buick division of General Motors. The Electra name was used by Buick between 1959 and 1990.- 1959–1960 :...
1991–2005		Buick Park Avenue Buick Park Avenue The Buick Park Avenue is a full-size car built by General Motors and sold by its Buick division. The nameplate was first used since 1975 as a top trim level of the Buick Electra, and the Park Avenue became a standalone model for the 1991 model year, replacing the Electra...
1985–1993		Cadillac DeVille Cadillac DeVille The de Ville was originally a trim level and later a model of General Motors' Cadillac marque. The first car to bear the name was the 1949 Coupe de Ville, a prestige trim level of the Series 62 luxury coupe. The last model to be formally known as a de Ville was the 2005 Cadillac Deville, a...	GM K platform (FWD) GM K platform (FWD) The General Motors K platform was an automobile platform designation used for front wheel drive Cadillac models beginning in 1980. It replaced the rear wheel drive K platform....
1985–1993		Cadillac Fleetwood Cadillac Fleetwood Lawrence P. Fisher was the Fisher brother most closely involved with Cadillac in its early years. In 1916 he joined the Fisher Body Company which had been formed by two of his brothers in 1908. Larry was one of four of the seven Fisher brothers who brought Fisher Body Corporation under the General... , Sixty Special Cadillac Sixty Special The Sixty Special name has been used at Cadillac to denote a special model since the 1938 Bill Mitchell-designed Series 60 derivative. Although the 1938 model began in Cadillac's lowest price range, soon the Sixty Special name would be synonymous for some of Cadillac's most luxurious...	GM D platform GM D platform The D platform, or D-body was Cadillac's full-size rear wheel drive automobile platform designation, used until 1996. It was closely related to the GM B platform and C platform.All D-bodies were built in Arlington, Texas from 1988-1996 model years...
1985–1996		Oldsmobile 98 Oldsmobile 98 The Oldsmobile 98 was a full-size automobile and the flagship model of the Oldsmobile division of General Motors. The name first appeared in 1941 and was used again after American consumer automobile production resumed post-World War II...