The Cadillac STS is a mid-size luxury sedan built by the Cadillac division of General Motors. First introduced in 2005, it is the successor to the discontinued Cadillac Seville. STS stands for “Seville Touring Sedan” and represents the new 3 letter naming scheme present in some of Cadillac’s newest models.
Power is provided by variety of engines ranging from a 3.6L V6 to a 4.6L V8. Transmission options include either a 5 or 6 speed automatic. The STS will be discontinued in 2010.