Riverhead Buick GMC is your hometown Riverhead GM dealership. Our reputation is built on customer trust, and our dedication is to make sure your experience with us is not only comfortable, but satisfying, as well. Located at 1423 Rt 58, our Buick GMC dealership is proud to serve our customers with an extensive new and used Buick and GMC vehicle inventory. With so many new and used car dealers in the area, we know that it can be difficult to choose. So why do Buick and GMC drivers choose Riverhead Buick GMC in Long Island? From our friendly staff to our dealership amenities, we put the customer first! If you have any questions about our dealership or inventory, please don’t hesitate to call us or stop by.