The Cadillac STS is a luxury full-size sedan that was manufactured by General Motors from 2005 to 2011. It was the successor to the Cadillac Seville, and was based on the mid-size GM Sigma platform. It featured a V8 engine, rear-wheel drive, and a suspension system that had been tuned for performance-oriented driving. The STS was well-equipped with options such as Bose audio systems, xenon headlamps, and dual-zone climate control.