After 10 years and only 107,000 miles my 2WD 2011 Silverado was still in very good shape. I had recently replaced all four of the oxygen sensors in the exhaust, and the front brake rotors. Had been maintained by McCaddon Cadillac for several years. Ed Bozarth in Denver gave me quite a bit more than Edmunds indicated it might be worth. Dog was not for sale.