About Us

Welcome to Roy Foss Thornhill Cadillac


Established in 1962, Roy Foss Motors Ltd. 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 Motors 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 Motors is a subsidiary of the Roy Foss Automotive Group, a leading Canadian automotive and real estate holdings company.

Dealer Info

Phone Numbers:Sales Hours:Special Hours
  • Canada Day Long Weekend - July 1st-3rdClosed
Regular Hours
  • Mon - Fri9:00 AM - 6:00 PM
  • Sat9:00 AM - 5:00 PM
  • SunClosed
Service Hours:Special Hours
  • Canada Day Long Weekend - July 1st-3rdClosed
Regular Hours
  • Mon - Fri7:30 AM - 6:00 PM
  • Sat - SunClosed
Parts Hours:Special Hours
  • Canada Day Long Weekend - July 1st-3rdClosed
Regular Hours
  • Mon - Fri8:00 AM - 5:00 PM
  • Sat - SunClosed

Our Mission

To earn a recommendation from every customer, every time through consistent, personalized service excellence in the defining moments of the dealership experience.



We stand for honesty, loyalty and humility in everything we do. What we do when no one else is looking defines us.

Service Excellence

We strive to WOW our guests by exceeding their expectations in those defining moments that shape their experience.

Positive Attitude

Enthusiasm is infectious; a positive mindset coupled with an unrelenting work ethic will help achieve the most ambitious of goals.


We find strength in the diversity of our talents and experiences. We will succeed by working together as one team.


We accept accountability for our actions and results. “Good enough” isn’t good enough as it conflicts with great.

Continuous Improvement

We embrace change and challenge conventional thinking. The best ideas thrive in a culture of creativity and risk-taking.

Roy Foss Thornhill Cadillac is located at: 7200 Yonge Street • Thornhill, ON L4J 1V8
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7200 Yonge Street • Thornhill, ON L4J 1V8

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Today's Hours:

Sales: Closed

Service: Closed

Parts: Closed

Roy Foss Thornhill Cadillac 43.802436, -79.423681.