ReadyLIFT 6" (6-inch + Factory 2-inch) Big Lift Kit With 2.1 Falcon Shocks - 2019-2024 1500 Trail Boss / AT4

The 44-39621 lift kit utilizes the very best in ReadyLIFT engineering with boxed steel front/rear cross members and a full-width front skid plate constructed of thick 3/16" plate steel. New 1/4-inch boxed plate steel differential drop brackets feature a double gusset and boxed center rib to take the abuse of front differential torsional twisting.

Our 6" (6" + 2") lift kit features heavy-duty angled and offset top mount strut extensions that realign the struts to optimize shock performance and minimize wear. A specially designed lower mount strut pre-load spacer offers the added benefit of a slight increase in spring rate to better handle the larger wheels and tires that will find their way onto this new lifted truck. To lift the rear, new fabricated steel rear blocks with integrated bump stop landings have been added as well as new rear Falcon 2.1 Monotube shocks.

With months of engineering and development and more awesome features than we could possibly mention, this new Big Lift Kit is the best 6" lift kit you can install on a new body style 2019-2024 GM 1500 4WD truck built with 2" factory lift! Thousands of miles of road and trail testing have proven our new 6" lift kit makes these new GM 1500 trucks ride better than stock!

Highlights

• Maintains the factory ride and handling.
• Delivers clearance for increased aftermarket tire sizes - up to 37x12.50 on 6-inch kit on 9" wide wheels with 0 offsets with no trimming. -18 offset will require minor trimming.
• The proprietary lower strut clamshell design maintains factory geometry and retains the 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 provide proper pinon angle. Also includes rear add-a-leaf for additional 1.5" lift.
• Includes premium Falcon 2.1 Monotube extended-length rear shocks.
• Note: Not compatible with rear mono-leaf springs. Not for use on Diesel as we don't include an oil line relocation bracket. Click here to learn how to determine if you have rear mono-leaf springs. Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT. Not for use on Diesel motor applications.
• NOTE: These will not fit late model 2024 or 2025 applications that have round U-bolts. Using U-bolt part number 67-35150UB will allow this kit to fit 2025 applications.

Tire Fitment

Recommended max tire with no trimming: 20x9 0 offset - 37x12.50 tire.

Kit Components

• Heavy-duty front-rear cross members and skid plate
• Heavy-duty top mount strut extensions and rear shock extensions
• Sway bar drop brackets
• Heavy-duty fab steel rear lift blocks with bump stop landings.
• Heavy-duty cast iron lift knuckles engineered to retain factory quality geometry.
• All necessary hardware and instructions.

Alignment and headlamp aim check recommended after installation.