In 1991, Cadillac introduced the Northstar engine, which were a family of high-performance 90° V engines produced by General Motors from 1991 to 2010. Regarded as GM's most technically complex engine, the original double overhead cam, four valve per cylinder, aluminum block/aluminum head V8 design was developed by Oldsmobile's R&D, but is most associated with Cadillac's Northstar series. The related Northstar System was Cadillac's trademarked name for a package of performance features introduced in mid-1992 that coupled variable valve timing, road sensing suspension, variable power steering, and 4-wheel disc brakes to the Division's high-output and high-torque Northstar engines.
For 1992, the Seville was redesigned to better compete with luxury performance sedans from Europe and had adopted some styling cues from the 1988 Cadillac Voyage concept car. A year later, the Brougham was discontinued and replaced by the all-new rear-wheel drive 1993 Fleetwood. The previous front-wheel drive Fleetwood was renamed Sixty Special for 1993. That same year, the Coupe deVille was discontinued due to the declining popularity of full-size coupes.
For 1994, the DeVille was redesigned to share the K-body platform with the Seville. The body was redesigned, although the wheelbase remained 113.8 inches—rather than the 111 inches used on the Seville. Production moved to Hamtramck, Michigan. Also for 1994, all DeVille models included a standard SRS driver-side front airbag, as well as fully digital instrumentation with integrated message center, which provided important vehicle information and status, current speed, outside temperature, and more, with controls mounted to the left of the instrument cluster. Also standard was a dual-zone front HVAC system, with controls located to the right of the instrument cluster, and remote controls on the front passenger door panel. A SRS passenger's-side front airbag became standard equipment after a restyling in 1996, which also brought revised exterior styling and new audio systems with TheftLock coded anti-theft technology. In 1995, the High Technology engine that had been used in Cadillacs since 1982 was discontinued.
For 1997, the Catera mid-size sedan was introduced as Cadillac's new entry level model. The DeVille was also redesigned that year. The late 1990s saw Cadillac field its first ever entry in the growing SUV segment. The Escalade, introduced in 1999, was marketed to compete with the Lincoln Navigator and luxury SUVs from various import brands.