The size of the tires on the 2018 GMC Sierra 1500 is different for different versions. For example it is 275/55R20 and 285/45R22 for the 2wd Crew Cab w/Performance Brake, 2wd Double Cab w/Performance Brake, 2wd Reg Cab w/Performance Brake, 4wd Crew Cab w/Performance Brake, 4wd Double Cab w/Performance Brake and 4wd Reg Cab w/Performance Brake. The tire pressure for the tires iS32 psi for the front and 32 to 35 psi for the rear 275/55R20 tires and 35 psi for the front and rear for all other sizes. The size of the wheels on the truck is 17 to 20 inches in diameter and 8 to 9 inches in diameter. The vehicle has a wheel bolt pattern of 6x139.7mm and a thread size of M14 X1.5. It has a center bore of 78.1 mm, it uses lug nuts as the wheel fasteners and the torque for those lugs is 190 Nm.
Mara D.
January 2, 2020
The tire pressure for the 2018 GMC Sierra 1500 is 35 psi, the tire size is P255/70R17 and the wheel size is 17 inches. The standard wheel size for the 2018 GMC Sierra 1500 will vary based on the model. The standard wheel size for the 2018 GMC Sierra 1500 base model is 17-inch silver aluminum wheels.
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