2026 GMC Sierra 1500 Tire Sizes
The short answer
The 2026 GMC Sierra 1500 came on 255/70R17, 265/70R17, 265/65R18, 275/60R20, 275/50R22, LT265/60R20, LT265/70R17, LT275/65R18, LT275/70R18 depending on trim.
Some values on this page are still waiting for a second source. We show what we have and mark it; confirm against your owner's manual before you buy.
Tire sizes by trim
All trims
255/70R17 See tires at Amazon
All trims
265/70R17 See tires at Amazon
All trims
265/65R18 See tires at Amazon
All trims
275/60R20 See tires at Amazon
All trims
275/50R22 See tires at Amazon
All trims
LT265/60R20 See tires at Amazon
All trims
LT265/70R17 See tires at Amazon
All trims
LT275/65R18 See tires at Amazon
All trims
LT275/70R18 See tires at Amazon
The size on the placard inside the driver's door jamb is the one your car left the factory with. Match that, not this table, if they differ; a previous owner may have changed wheels.
Wheel specs and lug torque
Bolt pattern
6x139.7 mm (6x5.5")
Lug nut torque
140 ft-lbs (190 Nm)
Key fob, battery and sensors
Key fob battery
CR2450 Shop on Amazon
Relearn
tool (the manual's TPMS sensor matching process)
Dimensions, weight and fuel
Fuel
Gasoline
Octane
87 (regular)
Fuel tank
24 gal (91 L)
Worth knowing about the 2026 Sierra 1500
- Spare. This vehicle carries a full-size spare.
- Tires. These are the sizes the owner's manual names for this truck; it does not tie them to trims, so check the door placard for yours.
- Torque. Tighten lug nuts to 140 ft-lbs in a star pattern with a torque wrench, and re-check after the first 50 miles. This figure is from the owner's manual; an impact gun will overshoot it.
- TPMS. New sensors on this car need a relearn (tool (the manual's TPMS sensor matching process)); they will not pair on their own by driving.
- Fuel. The 24-gallon tank is for gas short and standard boxes; long-box trucks hold 28.3 gallons, and the manual recommends 91 octane or higher for the 6.2L V8.