ReadyLift - 4"+2" Big Lift Kit - 2025-2026 Chevy/GMC 1500 (Trail Boss/AT4) - 44-35425

ReadyLIFT 4" (4" + 2" factory) big lift kit - 6" total lift - for the 2025-2026 Chevy Silverado 1500 Trail Boss and GMC Sierra 1500 AT4.

Engineered for ride quality and handling using boxed steel front/rear cross members and a full-width 3/16" plate steel front skid plate, with 1/4" boxed plate steel differential drop brackets (double gusset, boxed center rib). Heavy-duty angled/offset top mount strut extensions realign the struts, and a lower mount strut pre-load spacer manages the added spring rate. Fabricated steel rear blocks with integrated bump stop landings and a Falcon rear shock complete the rear.

Fits: 2025-2026 Chevrolet Silverado 1500 Trail Boss / GMC Sierra 1500 AT4, 4WD. Not for diesel applications. Not compatible with rear mono-leaf springs. Single cab configuration has not been validated by ReadyLIFT.

Features

• 6" total lift (factory 2" + ReadyLIFT 4")
• Heavy-duty top mount strut extensions and lower pre-load spacer
• 3/16" steel cross members and skid plate
• Anti-torsion differential drop brackets
• Falcon rear shock
• Includes ReadyGuard Powertrain Warranty

Kit Includes

• Boxed steel front/rear cross members
• Full-width 3/16" front skid plate
• Differential drop brackets
• Top mount strut extensions and lower mount pre-load spacer
• Fabricated steel rear blocks with integrated bump stop landings
• Falcon rear shock
• Hardware

Tire Fitment

On the 6" configuration: up to 20x9 0 offset with a 35x12.50 tire (no trimming); 20x10 -18 offset with 35x12.50 or 325/60R20 with trimming. An 18" wheel is not recommended (18x9 0mm offset or higher does not fit).

Notes

Use of the Auto 4 Hi feature is not recommended. Not for diesel applications. Not compatible with rear mono-leaf springs.