Clean Carfax and Free maint. For 1 year or 12,000 miles!!!. Mint condition! Have to see! If a picture is worth a thousand words, then how many words is this flawless 2011 Cadillac STS worth? This STS is a terrific car that we have placed at a fantastic price. It scored the top rating in the IIHS frontal offset test.*** Tell us that you saw this vehicle on the Dealix Used Cars Network ***.