About Us
Roy Foss Cadillac Thornhill
Thank You for Choosing Roy Foss Cadillac Thornhill
Established in 1962, Roy Foss owns and operates two of the largest General Motors dealership franchises in Canada. Our dealerships sell and service an award-winning lineup of cars, vans, SUVs, and trucks from Cadillac. We also sell and service a compelling lineup of off-make pre-owned vehicles from a variety of other manufacturers. With nearly three centuries worth of combined technician experience in our service bays, and a working inventory of over 250,000 different vehicle parts items, Roy Foss has become a landmark destination for competitively priced, high-quality maintenance and repair services. Our customer-centric business philosophy, driven by progressive programs like the Roy Foss 10-Point Pledge, has earned us a loyal following in the Greater Toronto Area. Roy Foss Cadillac Thornhill is a subsidiary of the Roy Foss Automotive Group, a leading Canadian automotive and real estate holdings company.
Our Mission
To earn a recommendation from every customer, every time through consistent, personalized service excellence in the defining moments of the dealership experience.













Today
Today, Roy Foss continues to build on more than six decades of automotive retail experience, operating dealerships across Thornhill, Woodbridge, and Aurora. Representing some of the industry's most recognized brands, including Chevrolet, Buick, GMC, Cadillac, Chrysler, Dodge, Jeep, and Ram, Roy Foss has established a strong presence in Ontario's automotive landscape.
Backed by longstanding manufacturer partnerships, a dedicated team of automotive professionals, and a commitment to exceptional customer experiences, Roy Foss continues to evolve with the changing needs of today's drivers. From vehicle sales and financing to service and long-term ownership support, our dealerships remain focused on building lasting relationships with the customers and communities we serve.
You've heard our story. Now it's time for the world to hear yours.