King Buick GMC is proud to be your Washington, DC Buick GMC dealer in Gaithersburg/Rockville area. We have served the community for the past 80 years. Over those years, we’ve seen a lot of changes to the greater Washington, DC area, but one thing hasn’t changed–our commitment to our customers in new & used car sales, service, or parts! If you’ve been looking at other Washington DC, Silver Spring, or Rockville GMC or Buick dealers, take a trip north on I-270 to see what a difference King Buick GMC offers! Get our hours and customized directions from anywhere in the Washington, DC area including Rockville, Silver Spring, Frederick, Columbia, MD and Gaithersburg, MD.