The lug nuts on a 2017 Chevy Equinox are M14 x 1.5 thread size, and measure 19 mm in diameter. It is important to make sure that you use the correct size for your vehicle when replacing or installing new lug nuts because an incorrect size can cause damage to the wheel studs and possibly lead to a loss of control while driving. Additionally, it is recommended by Chevrolet that you also replace all 5 lug nuts at once with new ones as this ensures uniform tension across all five bolts which helps ensure proper alignment of the wheels.