IN-STOCK NOW & Ready For Immediate Delivery – VIEW INVENTORY

Cooling System Service in Thornhill, ON

Not too hot or cold, treat your engine just right

For maximum performance and to keep your vehicle in top shape, your engine must remain at a precise temperature between 105-110 degrees Fahrenheit. Servicing your radiator and cooling system will help keep your engine at the optimum temperature for maximum performance. If simple maintenance isn’t enough, the GM Certified Service Experts at Roy Foss Thornhill can perform a cooling system service and flush your radiator to keep everything in order.

Symptoms to look out for:

  • Coolant warning light is on
  • Temperature gauge higher or lower than normal
  • Heather isn’t working
  • Steam coming from under the hood
  • Coolant leaking from the engine

Do you believe you may be having problems with your cooling system or radiator?

The GM Certified Service Experts at Roy Foss Thornhill can diagnose and repair cooling system issues and perform regularly scheduled cooling system maintenance such as radiator repairs or replacement and radiator flushing. Regular vehicle maintenance like this is the best way to avoid unplanned repairs further down the road.

If you suspect that there may be something wrong with your vehicle’s cooling system or radiator, book an appointment with a GM Certified Service Expert at Roy Foss Thornhill right away.

Service Specials

No-Charge Inspections - Cabin Air Filter and Engine Air Filter
Plus Available Instant Discounts on ACDelco Filters

Visit Roy Foss during August and September and receive a complimentary inspection of your Cabin and Engine Air Filter. If a replacement is required, you can receive a $5 instant discount on ACDelco cabin and engine air filters.

Offer valid from August 1, 2022 to September 30, 2022 at GM Canada Certified Service dealers. Customers who receive a no-charge filters inspection during the offer period will be eligible for an instant discount on new ACDelco cabin and engine air filters, $5 on each for a potential savings of $10. Instant discounts to be applied before applicable taxes. Customer must show proof of offer, via e-mail or, to be eligible for instant discounts. Customers applying instant discount to purchase of cabin or engine air filters must have them installed by the same dealer who completed the filters inspection. Discount can only be applied toward air filters installed on the same vehicle on which the no-charge filters inspection was completed. Offer available to retail customers only. Offer may not be combined with select Dealer specific incentives or promotions. GM Canada reserves the right to cancel, modify or amend the offer without notice. See dealer for details.

EXPIRES: 09/30/2022
Complimentary Foss Lifetime Tire Repair

Foss Life Time Tire Repair ImagePurchase a set of four (4) in-stock tires from Roy Foss and you will receive Complimentary Foss Lifetime Tire Repair!†

Complimentary Foss Lifetime Tire Repair offer is only applicable when purchasing four (4) in-stock tires from Roy Foss; rims, sensors, and installation not included. Foss Lifetime Tire Repair offer is only applicable on tire repairs for the purchased tires only and does not include rim damage or rim or tire pressure sensor replacement. Foss Lifetime Tire Repair offer is applicable on repairs involving installation of a tire plug/patch repair ONLY. It does not include tire replacement due to unrepairable tires (tread depth less than 2/32”, sidewall damage, damaged from mechanical failure, collision, off-road use, etc). Maximum claim is $49.95 before tax. Repairs must be completed at Roy Foss.

Senior's Day Every Tuesday
Receive 10% off service at Roy Foss! Contact us for details

Seniors Day Image

Senior’s Day offer applies to customers who are aged 65+ and is applicable on all vehicle repairs and maintenance items. All offers cannot be used on past purchases, cannot be redeemed for cash, and may not be combined with certain other offers. Please see Roy Foss for all offer details.


Book Your Service Appointment

Contact Service

Please don't hesitate to direct your service questions to us! Fill out the simple form below and our technicians will get back to you.

    Please tell us how you would like us to communicate with you so we can better address your needs.

  • By providing my personal information, I am consenting to its use and disclosure in accordance with GM Canada's Privacy Policy. I confirm that I have read the Privacy Policy. I understand that I may withdraw my consent and unsubscribe from receiving future communications from GM Canada or Roy Foss Thornhill, 7200 Yonge Street, (905) 886-2000, [email protected]

  • This field is for validation purposes and should be left unchanged.
Roy Foss Thornhill 43.802789, -79.422113.