Complete 1.75" leveling recommended for AT4X, Trail Boss suspension not as raked for the factory so installing without thin preload spacer will net 1-3/8" lift for a level stance. Tires wider than 295/ cannot be installed on factory wheels due to clearance issues to the steering knuckles. Will not fit Adaptive Ride Control (ARC) equipped models. 2022 Models: This system has not been tested on models equipped with Super Cruise. Tire and Wheel Fitment: 5.5" MAX Backspacing due to UCA Clearance 35/12.50 18x9, 20x9; 5.5" BS (Chevy) 33/12.50 18x9, 20x9; 5.5" BS (GMC) 295/60 20x9; 5.5" BS (GMC) 295/60 20x9, 5.5-4.5" BS (Chevy) 305/55 20x9, 5.5-4.5" BS (GMC & Chevy) 295/65 18x9, 5.5-4.5" BS (GMC & Chevy) 295/70 17x9, 5.5-4.5" BS (GMC & Chevy). Specially designed for the 2019-2023 Chevy ZR2 and GMC 1500 AT4X trucks, these kits are designed to a higher standard, working within the parameters of the factory suspension and steering geometry to maximize potential while allowing optimal clearance for larger tires. Kits include strut spacers, adventure series upper control arms, hardware packs and steering stop extensions.. High strength adventure series upper control arms allow more travel, increase strength and correct issues caused by kits using the factory UCAs. 3-piece design with top mount spacer and 2 preload spacers to raise ride height without over-extending suspension during droop travel. Zone Offroad 19-22 Chevy/GMC 1500 AT4X / Chevy ZR2 1.75in Leveling Kit. Allows clearance for 33-34" tires Includes Factory Protection Plus. 2019-2022 Chevy/GMC 1500 AT4X / Chevy ZR2 1.75" Leveling Kit. Maintains ride quality and handling characteristics. Zone 1.75" Leveling Kit. Suspension Leveling Kit. 1.75" Leveling Kit

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