READYLIFT | 1.75" Front Leveling Kit | 19-26 Chevy Silverado 1500 Trail Boss / GMC Sierra 1500 AT4 Excl. ZR2/AT4X | 66-3921

ReadyLIFT 2019-2026 GMC AT4 And Chevy Trail Boss - 1.75" Leveling Kit | 66-3921

Overview & Application Notes

1.75" front leveling lift for 2019-2026 GM AT4 and Trail Boss Not compatible with Sierra AT4X or Silverado ZR2 Edition.

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, 20x9 0 offset wheel

- Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel

If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with wheel spacers!

Product Details

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

Tire Fitment & Clearance

Note: AT4 and Trail Boss do not fit the same size tire. This is due to the difference in front fender opening design.

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

If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with wheel spacers!

Wheel and tire combinations must be test-fitted. Tire construction, wheel offset and vehicle configuration can affect clearance and ride quality.

Kit Contents

Heavy Duty tubular steel upper control arms with TCT maintenance free pivot bushings and heavy-duty 1-ton ball joints.

CNC machined billet aluminum top and bottom mount strut spacers.

Installation Instructions

• ReadyLIFT installation guide (PDF)

Warranty

ReadyLIFT’s product warranty applies to the original purchaser and covers eligible missing or defective components. Wearable components, including shocks, ball joints, heim joints, bushings and steering extensions, are covered for up to one year. Off-road abuse is excluded; Jeep SST and Terrain Flex lift kits are covered for normal recreational off-road use. Discontinued, clearance and outlet products are excluded. Labour, installation and related fees are not refundable, and consequential vehicle damage is excluded. Coverage is subject to ReadyLIFT’s full terms: ReadyLIFT warranty terms