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The wheel bolt pattern for the 2018 GMC Terrain is 5x115mm, which refers to the arrangement of 5 holes with a circle diameter of 115mm to secure the wheel/rim to the vehicle. The Terrain has a thread size of M12 X1.5, requires a torque of 140 Nm for the lugs, has a center bore of 70.3 mm, and uses lug nuts as wheel fasteners. The wheel sizes range from 17 to 19 inches in diameter and 7 to 7.5 inches in width. The tire sizes vary with the Denali model using 235/55R19, the SL and the SLE Diesel models using 225/65R17, and the SLT Diesel model using 225/60R18.
Mary gave an incorrect response. There are two distinct bolt patterns for this model. The SL and SLE versions have a 5x115 bolt pattern, while the SLT and Denali have a 5x120 bolt pattern.
The wheel bolt pattern specified by the manufacturer for the 2018 GMC Terrain is 5x120.