Tire Finder: Shop Tires for Your GMC in Hammond, LA
The Ross Downing GMC Tire Finder shows tires that fit your vehicle when you enter its year, make and model or a tire size, and the service department in Hammond, LA installs them. Your tire size is on the sidewall of your current tires and on the Tire Information Label inside the doorframe; call 985-222-2386 for help.
- Search 2 waysyear, make and model, or tire size
- Installed hereby GMC Certified Service technicians
- Service 985-222-2386Mon to Fri, 7:30 AM to 6 PM
- 1301 S Morrison BlvdHammond, LA, minutes from I-12 and I-55
How to Use the Tire Finder
Enter your vehicle's year, make and model, or the tire size from your sidewall, to see the tires that fit, then book installation online or by phone. If your size does not come up or you want a recommendation, call the service department at 985-222-2386.
Search by vehicle
- Choose the year, make and model
- Pick the trim if asked, since wheel sizes differ by trim
- Compare the tires that fit
- Book installation online
Search by tire size
- Read the size on your current tire's sidewall
- Or use the Tire Information Label inside the doorframe
- Enter the size in the Tire Finder
- Call 985-222-2386 if you are unsure
Current Tire Offers
Service and parts specials at Ross Downing GMC as of October 26, 2026:
- Tire Price Match Guarantee (Provide us with a better eligible price at the time of purchase and we'll match it. Find a better price within 30 days of the purchase, and we'll refund the difference.) (coupon code 201, offer ends 12/31/2026)
- Tire Pressure Monitor Sensor Rebate (Up to a $40 rebate on the purchase and installation of four select tire pressure monitor sensors) (coupon code 313, offer ends 11/30/2026)
- Tire Offer (Buy 3, get 1 for $1 on select tires) (coupon code 301, offer ends 11/30/2026)
Mention the coupon code when you schedule service or call 985-222-2386. Prices exclude tax; see each coupon for exclusions. See all service and parts specials.
Tire offers from Ross Downing GMC's service specials as of October 26, 2026.
How to Read a Tire Size
A tire size such as 275/60R20 115S gives the tread width in millimeters (275), the sidewall height as a percentage of that width (60), radial construction (R), the wheel diameter in inches (20), and the load index and speed symbol (115S). Match the size on your doorframe label unless the service department recommends otherwise for your trim.
| Part of the size | Example | What it means |
|---|---|---|
| Section width | 275 | Tire width in millimeters |
| Aspect ratio | 60 | Sidewall height as a percentage of the width |
| Construction | R | Radial tire |
| Wheel diameter | 20 | Fits a 20-inch wheel |
| Load index and speed symbol | 115S | How much weight the tire can carry and its speed category |
Tire size markings follow the standard sidewall format; the example is for illustration only.
After You Buy: Tire Care for Your GMC
GMC's maintenance guide calls for a tire rotation every 7,500 miles, and the full synthetic oil change coupons at Ross Downing GMC include one; check tire pressure at least monthly with cold tires. The tire service page covers rotation, alignment and when to replace tires.
Source: GMC maintenance guide (GMC.com).
Why Use the Ross Downing GMC Tire Finder
The Tire Finder narrows tires to the ones that fit, and Ross Downing GMC's Certified Service technicians install them at 1301 S Morrison Blvd in Hammond, Monday through Friday 7:30 AM to 6:00 PM. Call 985-222-2386 or book online.
Tire Finder Questions
How do I find tires that fit my GMC?
Enter your vehicle's year, make and model in the Tire Finder, or enter the tire size from your current tires, to see tires that fit. Then schedule installation online or call 985-222-2386.
Where is the tire size on my vehicle?
On the sidewall of your current tires and on the Tire Information Label inside the doorframe, which also lists the recommended cold tire pressure.
What do the numbers in a tire size mean?
In a size such as 275/60R20, 275 is the tire width in millimeters, 60 is the sidewall height as a percentage of the width, R means radial construction and 20 is the wheel diameter in inches.
What are the load index and speed symbol?
The number and letter after the size, such as 115S, are the load index and speed symbol: how much weight the tire is rated to carry and its speed category. Replacement tires should meet what your vehicle calls for.
Can I schedule tire installation online?
Yes. Book a time on the schedule service page, or call the service department at 985-222-2386, open Monday through Friday 7:30 AM to 6:00 PM.
What if my tire size does not come up?
Call the service department at 985-222-2386 with your vehicle's year, model and trim or your tire size, and they can help you find tires that fit.
When should I buy new tires?
GMC's maintenance guide says replacement will be required somewhere after 30,000 miles and that tread depth of 1/16 inch or less means it's time for new tires.
Where are tires installed?
At the Ross Downing GMC service department, 1301 S Morrison Blvd in Hammond, LA, by GMC Certified Service technicians.