The world's largest car manufacturer General Motors has under its control and supervision the brands of Buick, Chevrolet, GMC GM Daewoo Holden, Hummer, the defunct Oldsmobile, Opel, Pontiac, Saab, Saturn Vauxhall and Cadillac. Of these brands, the Cadillac is the one that bears the luxury automobile lineup. Cadillac automobiles have been produced and successfully sold in the markets of US, Canada and Northern America, although not that successful in the third market. Started as the Cadillac Automobile Company in 1902, it was bought by General Motors in 1909. Cadillac-brand automobiles have been recognized around the world for the great ease in comfort they offer. From then on, Cadillac never ceased to come up with outstanding luxury automobiles such as the Cadillac STS.
Originally, the name STS or Seville Touring Sedan was already used during the production of the famous Cadillac Seville as an upscale performance-oriented version. In 1992, Cadillac formally used the STS name as a separate model from the less-performance oriented Seville Luxury Sedan or simply SLS. The Cadillac STS is a 4-door, full-size luxury sedan that was sold by General Motor's Cadillac brand starting 2005. It was manufactured to serve as a replacement to the discontinued "import fighter" Cadillac Seville in 2004. Some its competitors include the Acura RL, Audi A6, BMW 5-Series, Infiniti M45, Lexus GS and Mercedes Benz CLS-Class.
The STS is based on the Sigma platform and closely related to the Cadillac CTS and SRX. Available powerplant for it is either a 3.6-liter LY7 V6 or a 4.6-liter Northstar LH2 V8 as compared to 1993 Seville's powerplant of then-new Northstar System powerplant with aluminum DOHC L37 V8 engine.
The STS also replaced the front-wheel drive engine-transmission layout of Seville, and now features a rear-wheel drive with optional all-wheel drive layouts. The STS is the first Cadillac sedan to use such kind of engine-transmission layout. As a full-size sedan, its wheelbase measures at 116.4 inches but ironically shorter than its mid-size predecessor in terms of overall length. Nevertheless, it has a great advantage regarding interior space over the Seville. The STS was also Cadillac's most expensive sedan model during its subsistence.
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