OPEN COUNTRY A/TIII
LT265/60R20 121S E
In stock locally
Installed next business day
Original-equipment tire sizes for the 2023 GMC Sierra 1500 from the factory fitment data, and the tires we can supply below. Prices are quoted all-in — tire, installation, balancing and taxes.
| Trim | Tire size (OE) | |
|---|---|---|
| AT4 | 265/60R20 | Shop 265/60R20 |
| 275/60R20 | Shop 275/60R20 | |
| 275/65R18 | Shop 275/65R18 | |
| AT4X | 275/65R18 | Shop 275/65R18 |
| AT4X AEV Edition | 275/65R18 | Shop 275/65R18 |
| Denali | 275/50R22 | Shop 275/50R22 |
| 275/60R20 | Shop 275/60R20 | |
| Denali Ultimate | 275/50R22 | Shop 275/50R22 |
| Elevation | 275/60R20 | Shop 275/60R20 |
| Pro | 255/70R17 | Shop 255/70R17 |
| 265/70R17 | Shop 265/70R17 | |
| 265/70R17 | Shop 265/70R17 | |
| Pro w/X31 Off-Road Pkg. | 275/65R18 | Shop 275/65R18 |
| SLE | 255/70R17 | Shop 255/70R17 |
| 265/65R18 | Shop 265/65R18 | |
| 265/70R17 | Shop 265/70R17 | |
| 265/70R17 | Shop 265/70R17 | |
| 275/60R20 | Shop 275/60R20 | |
| SLT | 265/65R18 | Shop 265/65R18 |
| 275/50R22 | Shop 275/50R22 | |
| 275/60R20 | Shop 275/60R20 |
These are the original-equipment fitments for this model. Optional wheel packages can differ — the door-jamb placard is final. Not sure? Text us a photo and we will confirm the size.