The Cadillac STS full size luxury performance sedan debuted for the 2005 model year, replacing the Seville in the exclusive Cadillac montage. The STS originally boasted an elegantly designed exterior, nimble handling, powerful engine options and lush interiors and has not changed much since its introduction-but there have been little to no complaints about that.

Luxury is obvious from both inside and out. The body style and elegant Cadillac grille are similar to the Cadillac CTS sedan, but the sharp lines have been softened with smoother edges which complimented the look of this sportier sedan and contributed to its distinctive visual appearance. Inside, the cabin is full of comfort and convenience features.

The STS is based upon General Motors rear and all wheel drive Sigma architecture. When it was introduced it was available in only one stunning trim that could be purchased with a 3.6 liter V6 or 4.6 liter V8, both with sophisticated suspension systems. Only the V8 version was available with all wheel drive. The V6 delivered a highly regarded 255 horsepower while the V8 models' 320 horsepower really gave it the ability to get up and go. The standard 5 speed automatic transmission had near flawless execution at all times.

Cadillac listened to public response to the STS, which was for the most part tremendously positive. Concerns were promptly addressed for the 2006 model year, the V6 edition gained the all wheel drive option and interior features were upgraded to include a Bose stereo and navigation system as part of the Luxury Package available for the V8. For the 2007 model year, the STS changed to stay current with advances in technology and engineering and a 6 speed automatic transmission was mated to the V8 model, which now carried a trim name of Luxury, and a Performance Handling Options Package arrived that included 18 inch chrome wheels, sport tires and top of the line Brembo brakes. To the delight of consumers and showing faith in their brand, the powertrain warranty was extended to 5 years/100,000 miles.

The Cadillac STS has consistently represented an extremely attractive alternative to foreign and domestic luxury sport sedans. It's sleek and chic visual appeal, powerful performance, nimble handling and all wheel drive capability have earned it a widespread reputation of being the best Cadillac ever produced.