!!!1 Owner Lease Return. CTS 3.6L Twin Turbo Vsport, Radiant Silver Metallic, and Navigation System. Won't last long! Previous owner leased it brand new! Want to save some money? Get the NEW look for the used price on this one owner vehicle. This great CTS is the fresh car with low miles and everything you'd expect from Cadillac, and THEN some. Family Owned and Operated for Five Generations. Lehmer's Concord Buick-GMC has been serving Concord and the San Francisco, Oakland Bay Area since 1928. We are dedicated to making sure you have the best experience possible.