General Motors C platform (FWD)

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GM C platform (FWD)
)
This article is about the front-wheel drive 1985-1996 C platform. For the original 1936-1984 rear-wheel drive C platform, see
GM C platform (1936)
.
See also:
List of GM platforms
GM C platform (FWD)
GM G platform

GM C platform, also known as the C-Body, was a

front wheel drive (FWD) automobile platform used by General Motors
' Cadillac, Buick and Oldsmobile divisions for their full-sized automobiles from 1985 through 1996, sharing unibody construction, transverse engine configuration, rack and pinion steering and four-wheel independent suspension.

C-Bodies used, V6 or V8 engines, GM's TMH440 transaxle (initially), unibody construction — and all had been aerodynamically refined, with the Oldsmobile achieving a .383 drag coefficient.

GM's C platform and

H platform were largely identical, sharing the same 110.8 in wheelbase, most bodywork, interior details, glass and engines. Manufacture began with the C platform in late 1983, first at two purpose-built plants, Wentzville Assembly and Orion Assembly — later moving to Lansing Car Assembly
as well as Flint and Willow Run assembly plants.

Significantly shorter, narrower, lighter and more fuel-efficient than the platform they replaced, the C Platform vehicles were noted for having nearly the same key interior dimensions as their predecessors and a much more nearly flat passenger compartment floor[1] — albeit with thinner seats and dramatically less upper tumblehome, locating windshield as well as side glass closer to passengers.[1]

Introduced in early 1984, the models were marketed as the

Cadillac Deville (6th gen) and Fleetwood
(1985-90)..

Cadillac would later introduce C Body models with a 113.8 in wheelbase. Most C-body vehicles were ultimately replaced with cars on the related

K
platform designations.

The

Oldsmobile Touring Sedan
.

Models using the C Platform

Years Model Next platform
1985–1987 Cadillac Series 75 -
1985–1992 Cadillac Fleetwood
GM D platform
1985–1993
Cadillac De Ville (6th Generation)
GM K platform (FWD)
1987–1993 Cadillac Sixty Special -
1985–1990 Buick Electra (6th Generation) -
1991–1996 Buick Park Avenue
GM G platform (FWD)
1985–1996 Oldsmobile 98 (11th generation)
1987–1990
Oldsmobile Touring Sedan
(subsequent 98 trim levels used a succeeding platform)

Related H body models

The

H platform
and C platform were largely identical, sharing the same 110.8 in wheelbase, most bodywork, interior details, glass and engines.

Years Model Previous platform Next platform
1986–1999 Buick LeSabre
GM B platform
 GM G platform
1986–1999
LSS
GM B platform
 Retired
1987–1999 Pontiac Bonneville
GM G platform (RWD)
 GM G platform (FWD)


References

  1. ^
    Jim Dunne (April 1984). "PS Drives GMs 85 Luxury Cars"
    . Popular Science, April 1985.
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