Tire fitment
The 2019-2025 GMC Sierra 1500 base tire size is 265/70R17 — 265 mm wide with a 70% aspect ratio on 17″ rims. 4 OEM sizes are available across trims.
2019-2025 GMC Sierra 1500
265/70R1731.6″ overall diameter · 185.5 mm sidewall · ~638 rev/mi
| Trim | Tire size | Rim | Diameter | vs Base |
|---|---|---|---|---|
| Pro/SLE ★ | 265/70R17 | 8×17″ | 31.6″ (802.8 mm) | — |
| SLT/AT4 | 275/65R18 | 8.5×18″ | 32.1″ (814.7 mm) | +1.48% |
| Denali | 275/60R20 | 9×20″ | 33″ (838 mm) | +4.38% |
| Denali Ultimate | 275/50R22 | 9×22″ | 32.8″ (833.8 mm) | +3.86% |
The 2019-2025 GMC Sierra 1500 ships with 265/70R17 tires on the base trim — that's an overall diameter of 31.6″. The 265 mm width and 70% sidewall ratio give you 185.5 mm of sidewall cushion between the rim and the road.
Match the load index and speed rating from your door-jamb placard — not just the size. If you're switching sizes, keep the overall diameter within ~3% to avoid speedometer error and potential ABS/traction-control issues.
Factory fitment for the 2019-2025 GMC Sierra 1500; verify against your door-jamb placard or owner's manual.
The base 2019-2025 GMC Sierra 1500 uses 265/70R17 tires — 265 mm wide, 70% aspect ratio, on 17-inch rims. The overall diameter is 31.6″ (802.8 mm). Higher trims use different sizes — see the table above. Confirm against your door-jamb placard.
Yes, within limits. Keep the overall diameter within about 3% of 31.6″ to avoid speedometer error and clearance issues. A wider tire may improve grip, but match the load and speed ratings your Sierra 1500 requires.
265/70R17 tires have an overall diameter of 31.6″ (802.8 mm), with a 185.5 mm sidewall height. That's about 638 revolutions per mile.
The 2019-2025 GMC Sierra 1500 tire sizes shown are OEM factory fitments. Confirm your exact tire size, load rating, and speed rating against the door-jamb placard or owner's manual before buying tires.