Right off CT-8 on Bridgeport Ave. is where you'll find Mario D'Addario Buick GMC. We're the home of your trustworthy service and repair center in SHELTON, CT. If you're looking for reliable service technicians that are experienced in oil changes, brake replacement, engine checks, tire rotations and more, Mario D'Addario Buick GMC is the place to be. Schedule a service appointment online right now, and we'll have your car running healthy on the road once again. The winters can be brutal here in Connecticut in which your vehicle may demand extra attention at times due to driving in brutal conditions. If you have any doubt of your vehicle's health going into winter, let Mario D'Addario Buick GMC give you a hand in driving through those treacherous conditions.