GM K platform
The General Motors K platform (commonly called K-Body) was the basis of the Cadillac Seville model over two entirely different automobile platforms.
Rear wheel drive The rear wheel drive K platform was based on the X-body Chevrolet Nova and shared components with the F-bodies of the 1970s. It used a stretched 114.3 in wheelbase, a simple front double A-arm suspension with a solid axle and leaf springs in the rear. It was the basis of the successful Cadillac Seville of that era. The platform used unibody construction with a front subframe assembly, a design which first appeared in 1967 on the first F-body Chevrolet Camaro.
Front wheel drive The front wheel drive K-body was used for full-size Cadillacs from 1979. K-bodies were sedans; coupes used the identical GM E platform. Unlike most GM platforms, the K was not shared by multiple divisions (though the E was). Technically, though, the architecture was shared under a different name: the GM G platform was based on the K and produced at the same time. The K platform was updated in 1997 with improved suspension geometry. The Seville was replaced with the rear wheel drive GM Sigma platform Cadillac STS for 2005, but the DeVille's replacement, the DTS continues on the K-body.
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