ReadyLift 2025-2026 6in+2in Big Lift Kit 1500 Trail Boss / AT4 - 44-35625

6"+2" Big Lift Kit 2025-2026 1500 Trail Boss / AT4 (part number 44-35625).

The 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 1.1 Monotube shocks.

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! Maintains the factory ride and handling. 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 1.1 Monotube extended-length rear shocks. Includes ReadyGuard Powertrain Warranty.

Fitment and Installation Notes

• 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.
• Use of Auto 4 Hi feature not recommended.
• Not compatible with rear mono-leaf springs. 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.
• Not for use on Diesel as we don't include an oil line relocation bracket.

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.

Product Details

• Brand: ReadyLift
• Part Number: 44-35625
• Category: Suspension Lift Kits