What is the history of the Cadillac STS?
The STS is the successor to the Cadillac Seville. That car used the STS name, standing for "Seville Touring Sedan" on upscale performance-oriented versions from at least 1988. In 1992, Cadillac split the Seville line into STS and less performance-oriented SLS (for "Seville Luxury Sedan") trim lines. The next year, the STS got Cadillac's then-new Northstar System, including the aluminium DOHC L37 "Northstar" V8 engine. Throughout its existence, the STS was Cadillac's highest-priced sedan model. Worldwide, the STS is Cadillac's flagship model. In North America, the STS is positioned between the mid-size CTS and larger DTS, and is priced above the DTS.
Cadillac has confirmed that it will be discontinuing the STS and the larger DTS sedan for the 2010 model year. They will be replaced with one performance sedan.