2018 GMC Terrain: What is the tire size and pressure, and wheel size?

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Mark B. December 17, 2020
The size of the tires on the 2018 GMC Terrain depends on the version. The Denali has a size of 235/55R19, the SL and the SLE Diesel has a size of 225/65R17 and the SLE and SLT has a size of 225/65R17, 225/60R18 and 235/50R19. The recommended tire pressure for the Terrain iS35 psi for both the front and rear tires for all versions. The size of the wheels for the vehicle is 17 to 19 inches in diameter and 7 to 7.5 inches in width. The SUV has a wheel bolt pattern of 5x115mm. It has a thread size of M12 X1.5, a center bore of 70.3 mm and it uses lug nuts as the wheel fasteners.
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Jean-Marie Robichaud June 27, 2020
Tire pressure recommended
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Mara D. January 2, 2020
The base model wheel size for the 2018 GMC Terrain is 17-inch. The tire size for the 2018 GMC Terrain is P255/70R17. The recommended tire pressure for the 2018 GMC Terrain is 35 psi.
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Katrinka L April 13, 2021
P255/70R17 tire pressure should be at 35
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