Part Type

Suspension Leveling Kit

Description Features and Benefits

RL 1.75'' LEVELING KIT 2019-2023 GMC AT4 And Chevy Trail Boss - 1.75'' Leveling Kit ReadyLIFT customers have asked for it and we have delivered. In fall of 2018 we announced our new leveling and SST lift kit offerings for the all-new GM 1500 trucks. We specifically did not include the factory lift kit-equipped GMC AT4 and Chevy Silverado Trail Boss. The AT4/Trail Boss are factory equipped with a 2" front lift. This front lift includes a longer front shock/strut assembly. When combining a traditional leveling kit on these factory lifted trucks, several issues present themselves including binding problems with the factory control arm ball joint and contact concerns with the lower strut/CV axle assembly. The ReadyLIFT 66-3921 1.75" leveling kit is similar to our popular 66-3086 leveling kit for pre-2019 trucks. The 66-3921 leveling kit provides required amount of lift without causing conflict with the factory strut geometry and clearances. In light of the factory upper control arm's lack of dynamic range when the  AT4/Trail Boss truck is further lifted, this leveling kit includes our popular tubular upper control arms with corrected ball joint cup angles, heavy-duty replaceable ball joints and out new Terrain Control Technology (TCT) maintenance-free pivot bushings with side-biter washers to improve alignment retention. Note: AT4 and Trail Boss do not fit the same size tire. This is due to the difference in front fender opening design. NOTE:     Not compatible with Sierra AT4X or Silverado ZR2 Edition. 66-3921 Leveling Kit: AT4 - Max tire 275/60-20, 20x9 0 offset wheel Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel 1.75" front leveling lift Compatible with 20192023 GM AT4 and Trail Boss models Not compatible with Sierra AT4X or Silverado ZR2 Edition Includes DOM tube steel upper control arms TCT maintenancefree pivot bushings 1ton ball joints CNC machined aircraftgrade billet Aluminum top and bottom strut spacers AT4 Max tire size: 275/6020 AT4 Max wheel size: 20x9 with 0 offset Trail Boss Max tire size: 295/6520 Trail Boss Max wheel size: 20x9 with 0 offset Compatible with 2019 Compatible with 20192023 GM AT4 and Trail Boss models TCT maintenance TCT maintenancefree pivot bushings 11ton ball joints CNC machined aircraft CNC machined aircraftgrade billet Aluminum top and bottom strut spacers AT4 AT4 Max tire size: 275/6020 AT4 AT4 Max wheel size: 20x9 with 0 offset Trail Boss Trail Boss Max tire size: 295/6520 Trail Boss Trail Boss Max wheel size: 20x9 with 0 offset"

x1 DRIVER SIDE AIR SPRING ASSEMBLY x1 PASSENGER SIDE AIR SPRING ASSEMBLY x1 HARDWARE KIT x1 MANUAL INFLATION KIT