2019-2026 GMC AT4 And Chevy Trail Boss – 1.75″ Leveling Kit (part number 66-3921).
– Includes DOM tube steel upper control arms with TCT maintenance-free pivot bushings and 1-ton ball joints
– CNC machined aircraft-grade billet aluminum top and bottom strut spacers AT4
– AT4 – Max tire 275/60-20, 20×9 0 offset wheel
– Trail Boss – Max tire 295/65-20, 20×9 0 offset wheel
– If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with wheel spacers!
Fitment and Installation Notes
– 1.75″ front leveling lift for 2019-2026 GM AT4 and Trail Boss
– The 66-3921 leveling kit provides required amount of lift without causing conflict with the factory strut geometry and clearances.
– AT4 and Trail Boss do not fit the same size tire. This is due to the difference in front fender opening design.
– Not compatible with Sierra AT4X or Silverado ZR2 Edition.
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