2019-2021 GM 1500 4WD 8" Lift Kit Maintains the factory ride and handling. Delivers clearance for increased aftermarket tire sizes - up to 37x12.50 on 8-inch kit on 9" wide wheels with 0 offset with no trimming. -18 offset will require minor trimming. Proprietary lower strut clam shell design maintains factory geometry and retains use of the factory strut. Tube steel upper control arms with maintenance-free pivot bushings and 1-ton ball joints. 3/16-inch thick steel plate cross members and skid plate. Anti-torsion boxed and gusseted plate steel differential drop brackets. Fabricated steel 5" rear lift blocks include integrated bump stop landings, offset pin and provides proper pinon angle. Also includes rear add-a-leaf for additional lift. Includes premium Falcon 1.1 Monotube extended length rear shocks. Includes ReadyGuard Powertrain Warranty. Note: Use of Auto 4 Hi feature not recommended. Note: Not for use on Trail Boss, AT4, AT4X, ZR2, Diesel or Denali models. Note: Not compatible with Adaptive Ride Control or Multimatic suspension.