GM Certified Service

Get the best possible service from the experts!

Certified Technicians know your vehicle inside and out and are specifically trained to service Chevrolet, Buick, GMC and Cadillac vehicles using a wide variety of parts to suit any budget from ACDelco to original equipment. Request a quote or schedule a service appointment today to receive “Expert Service at Competitive Prices”.

GM Certified Service
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Book Appointment Online

Quick, efficient and the ability to book an appointment online 24 hours a day.

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Oil Change Service

Oil Change

If you need an oil change, take a 29-minute break in one of our two waiting areas, and grab a cup of coffee as we give your vehicle a lube, oil and filter change, a complimentary car wash, interior clean, alignment check and much more!

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Service Specials

Service Specials

Take advantage of our special discounts on select services.

Service Specials

We have your best interests in mind, so we only hire the most highly trained mechanics to work in our service centre. Our repair technicians know your GM vehicle better than anyone, so they work quickly and efficiently, and that can save you money.

 

Dealership Info

Phone Numbers:Sales Hours:Holiday Hours
  • July 1st - ClosedClosed
  • July 2nd - ClosedClosed
Regular Hours
  • Mon - Fri9:00 AM - 6:00 PM
  • Sat9:00 AM - 5:00 PM
  • SunClosed
Service Hours:Holiday Hours
  • July 1st - ClosedClosed
  • July 2nd - ClosedClosed
Regular Hours
  • Mon - Fri7:30 AM - 6:00 PM
  • Sat8:00 AM - 1:00 PM
    (Express Service Only)
  • SunClosed
Parts Hours:Holiday Hours
  • July 1st - ClosedClosed
Regular Hours
  • Mon - Fri8:00 AM - 5:00 PM
  • Sat - SunClosed
Roy Foss Cadillac Thornhill is located at: 7200 Yonge Street • Thornhill, ON L4J 1V8
Roy Foss Cadillac Thornhill 43.802436, -79.423681.