In May 2004, Sewell opened its state-of-the-art Cadillac dealership in Grapevine. While the dealership may be relatively new to the area, the Sewell name is anything but. The Sewell family originally settled in Grapevine around 1868. We are a Cadillac Master Dealer and hav ebeen the fastest-growing Cadillac dealership in the United States since opening.