2023 GMC terrain tire sizes & fitment
Approved tire and wheel sizes for the 2023 GMC Terrain, sourced from manufacturer fitment data and refreshed monthly.
Approved fitments
| Tire size | Rim size | PCD (bolt pattern) | Offset | Load index | Speed rating |
|---|---|---|---|---|---|
| 225/60R18 OEM | R18 | N/A | N/A | N/A | N/A |
| 235/50R19 OEM | R19 | N/A | N/A | N/A | N/A |
Best by use case
Four tires, four jobs
Best all-season
Goodyear
Assurance MaxLife
all-season touring, UTQG 820, 85,000-mi warranty
Best budget
Goodyear
Assurance MaxLife
Lowest cost per mile in this size; UTQG 820
Best quiet
Michelin
Defender 2
68 dB cabin noise (EU label); quietest in this size
Best winter
Michelin
X-Ice snow
Dedicated winter (premium compound); ice/snow grip
See the best tires for the GMC Terrain, ranked by category →
Tire recalls & safety complaints for the GMC Terrain →
Compatible alternative sizes for 225/60R18
Sizes within the ETRTO ±3% overall-diameter safe-fit tolerance. Each row links to the size's own page.
| Alternative size | %Δ OD | Category | Verdict |
|---|---|---|---|
245/50R19 |
0.06% | plus 1 | Safe |
245/55R18 |
-0.07% | wider | Safe |
245/45R20 |
0.18% | plus 2 | Safe |
205/60R19 |
0.19% | plus 1 | Safe |
245/60R17 |
-0.19% | alternative | Safe |
For the full list of alternatives with comfort/handling impact, see 225/60R18 upsize options. To check an arbitrary size pair, use the tire compatibility calculator.
Check a different size against this vehicle
Type any tire size below; we'll compute its overall-diameter delta against the OEM 225/60R18 and verdict using the ETRTO ±3% rule.
Common upgrade paths
- Plus-1: 245/50R19; one rim size up, 0.06% OD change. Sharper steering, mild ride penalty, modest cost premium.
- Plus-2: 245/45R20; two rim sizes up, 0.18% OD change. Noticeable ride penalty, higher pothole risk, meaningful tire-cost premium.
Use the plus-size calculator to evaluate any rim step against the OEM size.
How to choose tires for the 2023 GMC terrain SLT
The 2023 GMC Terrain SLT ships from the factory on 225/60R18 tires mounted on R18 wheels. 2 approved fitments are documented for this model year, allowing some flexibility between performance, comfort, and winter compounds. The Compatible alternative sizes table above lists every safe substitution within the ETRTO ±3% overall-diameter tolerance.
Tire choice on the GMC Terrain comes down to three trade-offs that matter more than brand loyalty: load index (must equal or exceed the OEM number), speed rating (must match or exceed the placard), and UTQG treadwear (higher means longer life, lower usually means stickier rubber). Owners replacing factory tires with the same compound class, for example all-season for all-season, generally see no change in ride characteristics or fuel economy. Switching categories (performance summer to all-season touring, for example) is where the trade-offs show up at the contact patch.
For 2023 GMC Terrain SLT owners considering a plus-size upgrade, the safer option is a Plus-1 step (one rim size up with a 10-point aspect drop and ~10 mm of additional section width). Plus-2 is technically viable on this chassis if the alternative-sizes table lists a Plus-2 candidate within tolerance, but expect a meaningful ride-harshness penalty and a tire-cost premium of 30–60% per tire relative to the OEM fitment. For winter use the recommended pattern is one width step down (e.g. from a 235 to a 225) with the aspect ratio bumped up to preserve overall diameter; narrower tires apply higher contact pressure per square inch on snow, which translates directly into shorter braking distances. The plus-size calculator evaluates any specific rim step against this OEM size.
Before purchasing, verify the tire size on the driver-door placard of your specific 2023 GMC Terrain SLT, since trim levels and option packages can shift the original fitment from what is documented here. The placard reading is the authoritative source per FMVSS 110, and dealers will reference the placard rather than aftermarket catalogs when validating warranty claims.
NHTSA-reported issues for 2023 GMC terrain
Top issue category: Tires (General)
Most reported: Tires (General) (9) · TPMS (4) · Sidewall (1) · Valve (1)
Reported across: 2010 – 2019 (7 years)
What owners described
Pressure-monitoring (TPMS) fault appears in 50% of these reports; about 20.8× as often as across all tire complaints. Percentages are shares of the 12 reports covering every model year of the GMC Terrain that include a written account; a single report can describe more than one problem, so they do not total 100%.
| Reported problem | This subject | All tire complaints | Relative |
|---|---|---|---|
| Pressure-monitoring (TPMS) fault | 50% | 2% | 20.8× |
| Sidewall failure | 33% | 15% | 2.2× |
| Tread or belt separation | 17% | 13% | 1.2× |
| Cracking or dry rot | 17% | 9% | 1.8× |
| Blowout or sudden deflation | 8% | 20% | 0.4× |
| Loss of control, rollover or collision | 8% | 8% | 1.0× |
Mileage at failure
7 of these reports state an odometer reading. The middle report is at 31,000 miles, with 8 in 10 falling between 10,000 and 112,790 miles.
In owners' own words
Verbatim excerpts from complaints filed with NHTSA about GMC Terrain. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.
THE CONTACT OWNS A 2010 GMC TERRAIN EQUIPPED WITH MICHELIN TIRES LINE LATITUDE TOUR TIRES, SIZE P235-55-R18, AND DOT NUMBER: M33J-007. THE CONTACT STATED THAT ALL TIRES EXHIBITED TREAD SEPARATION AND CRACKS FROM THE SIDEWALL. ADDITIONALLY, THE STEEL BELT WAS SEPARATED. THE TIRES WERE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE TIRE AND VEHICLE FAILURE MILEAGE WAS 30,000. THE VIN WAS NOT AVAILABLE.
THE CONTACT OWNS A 2012 GMC TERRAIN. WHILE DRIVING 10 MPH, THE TPMS WARNING LIGHT FOR THE FRONT DRIVER SIDE TIRE. ON A LATER DATE, THE FRONT PASSENGER SIDE TPMS WARNING LIGHT ILLUMINATED. THE FAILURE RECURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS TAKEN TO A DEALER WHO MADE AN UNKNOWN ADJUSTMENT; HOWEVER, THE FAILURE PERSISTED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 10,000.
THE CONTACT OWNS A 2015 GMC TERRAIN. THE CONTACT STATED WHILE DRIVING AT VARIOUS SPEEDS, THE TIRE AIR PRESSURE DECREASED. THE LOW TIRE PRESSURE WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO CENTRAL BUICK GMC OF NORWOOD (70 BOSTON-PROVIDENCE TURNPIKE, NORWOOD, MA 02062, (781) 473-0908) TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE SET OF VALVE STEMS NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED HOWEVER, THE FAILURE RECURRED. THE FAILURE MILEAGE WAS 35,000.
WHILE DRIVING @ 55 CENTER LANE FREEWAY INDICATOR LIGHTS SHOWED LOSS OF TIRE PRESSURE ON PASSENGER REAR TIRE. MOVED TO SHOULDER OF FREEWAY AND SAW REAR TIRE HAD NUMEROUS CRACKS ON BOTH INTERIOR AND EXTERIOR SIDE WALLS OF TIRE COVERING TOTAL CIRCUMFERENCE OF TIRE; TIRE HAD BEGUN SMOKING. ASSISTED BY STATE SAFETY PATROL AND TECHNICIAN MADE COMMENTS AS TO HAVE "NEVER SEEN A TIRE SHRED IN THIS MANNER". TREAD HAD BEGUN TO SEPARATE FROM TIRES EDGE AND CRACKS WERE APPROX.. 3 INCH'S APART AND ABOUT 2 INCHES IN LENGTH. TIRE TAKEN TO DEALERSHIP FOR REVIEW AND REPLACEMENT; DEALERSHIP ALSO COMMENTED ON THE DAMAGE AS BEING EXTREMELY UNUSUAL. VEHICLE IS 2011, SINGLE DRIVER WITH APPROX. 31000 MILES.
Complaints are voluntarily submitted to the NHTSA Office of Defects Investigation and are not verified by NHTSA; they represent owner-reported problems, not proven defects. Counts can be useful as a relative quality signal across comparable tires or vehicles.
Frequently asked questions
What size tires fit a 2023 GMC Terrain?
Can I run a different tire size on my 2023 GMC Terrain?
Where can I buy tires for my 2023 GMC Terrain?
What is the recommended tire pressure for the 2023 GMC Terrain?
Can I fit winter tires in a different size on my 2023 GMC Terrain?
How often should I rotate the tires on my 2023 GMC Terrain?
For broader tire questions; replacement timing, UTQG, EV-specific tires, winter swaps; see the tire FAQ.
Sources for this page
- Vehicle owner's manual tire & wheel placard; door-jamb placard on the GMC Terrain is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
- NHTSA SaferCar; recall lookup for the 2023 GMC Terrain.
- ETRTO 2024 Standards Manual §2.3; overall-diameter math used for the alternative-size verdicts above.
- Tire & Rim Association 2025 Yearbook; load-index to maximum-load reference.
Last verified 2026-09-02.