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 through 2004. K-bodies were sedans; coupes used the identical GM E platform.

The K platform was updated in 1997 with improved suspension geometry. These cars were replaced with the rear wheel drive GM Sigma platform Cadillac STS for 2005.

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.

• 113.8 in wheelbase (basis for 1995 GM G platform)
  • 1989-1993 Cadillac Deville (sedan, not coupe)
  • 1994-1999 Cadillac Deville
• 111 in wheelbase
  • 1992-1997 Cadillac Seville
• 112.2 in wheelbase (basis for 2000 GM G platform)
  • 1998-2004 Cadillac Seville
• 115.3 in wheelbase
  • 2000-2004 Cadillac Deville