Confirm Tire SizeWhere can I find my tire size?
Shopping for tires? Select tire size to proceed.
2018 GMC Sierra 1500 SLT
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: 18"
P265/65R18Original Equipment Wheel Diameter: 20"
P275/55R20Original Equipment Wheel Diameter: 22"
P285/45R22