3/4 Ton Extended Cargo Van!!! 2017 Chevrolet Express 2500HD Cargo Van!!! V8!!! Power Windows and Locks!!! Air Conditioning!!! Bulkhead!!! Rubber Floor Mat!!! Great Work Van at a Great Price. 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 tomaking sure you have the best experience possible. Prior Rental.