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BigO Tire
Confirm Tire Size
Shopping for tires? Select tire size to proceed.
2021 GMC Sierra 1500 Base
GMC equips your vehicle with more than one possible size during production. Please select the size installed on your vehicle from the choices below.
Original Equipment Wheel Diameter: 17"
265/70R17
Original Equipment Wheel Diameter: 17"
LT265/70R17
Original Equipment Wheel Diameter: 17"
255/70R17
Original Equipment Wheel Diameter: 18"
265/65R18
Where can I find my tire size?Where can I find my tire size?