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Why Choose Roy Foss Thornhill?

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Google Apr 17, 2021

Was in for the first oil change on my Encore GX. The service folks pointed out there was an outstanding recall notice so made time to address it at the same time. Work was completed quickly and staff were friendly and helpful. From a COVID perspective appropriate protocols were in place and felt safe.

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Google Apr 16, 2021

I bought my 2nd pre-owned vehicle from Mike Raguso and he is fantastic to deal with. Honest, straightforward, professional and will do everything he can to make you happy. He has my business for life!

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Google Apr 16, 2021

Outstanding customer service from Nick Navidi and Roy Foss yet again. This is our third vehicle from Nick and he keeps hitting home runs with the deals and service. My husband and I love our new Cadillac. Thanks for everything Nick.

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Google Apr 14, 2021

. I had a very good experience with Nick he is so professional and good personality, he also gave me a good deal.

Welcome to Roy Foss Thornhill

Chevrolet Buick GMC Dealer in Thornhill, ON

Roy Foss Thornhill is Thornhill‘s premier Chevrolet Buick GMC Dealership with a long-standing tradition of excellence since 1962. Our world-class facility offers sales and financing of new, used and certified pre-owned vehicles as well GM Certified Service. We provide our valued customers an experience that not only meets but exceeds their expectations, time and time again. Whether you’re shopping for your next vehicle, or are in need of scheduled maintenance or repairs, we can help! Roy Foss Thornhill is conveniently located in the GTA near North York and Markham. Visit Roy Foss Thornhill today, our team looks forward to serving you!

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7200 Yonge Street Thornhill, ON L4J 1V8


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(888) 630-4944

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7200 Yonge Street • Thornhill, ON L4J 1V8

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Today's Hours:

Open Today! Sales: 9am-6pm

Open Today! Service: 7:30am-6pm

Open Today! Parts: 8am-5pm

Roy Foss Thornhill 43.802789, -79.422113.