ReadyLift - 6" Big Lift Kit (Trail Boss/AT4, Falcon Shocks) - 2025-2026 Chevy Silverado 1500 Trail Boss / GMC Sierra 1500 AT4 (4WD) - 44-35625

6-inch big lift kit with Falcon 1.1 Monotube rear shocks for the 2025-2026 Chevy Silverado 1500 Trail Boss and GMC Sierra 1500 AT4.

Engineered for the new-body GM 1500 4WD trucks built with a 2-inch factory lift. Boxed 3/16-inch steel front/rear cross-members and a full-width front skid plate anchor the system, with heavy-duty angled, offset top-mount strut extensions and a lower-mount pre-load spacer that optimize shock performance and add spring rate for larger wheels and tires. Thousands of miles of road and trail testing prove the trucks ride better than stock.

Fits: 2025-2026 Chevy Silverado 1500 Trail Boss and GMC Sierra 1500 AT4, 4WD (trucks built with the 2-inch factory lift).

Features

• Angled/offset top-mount strut extensions with lower-mount pre-load spacer
• Proprietary lower strut clam-shell design retains the factory strut and geometry
• Tube-steel upper control arms with maintenance-free pivot bushings and 1-ton ball joints
• 3/16-inch steel plate cross-members and skid plate
• Anti-torsion boxed and gusseted steel differential drop brackets
• Fabricated steel 5" rear lift blocks plus a rear add-a-leaf for an additional 1.5"
• Premium extended-length Falcon 1.1 Monotube rear shocks
• Includes ReadyGuard Powertrain Warranty

Tire Fitment

Up to 37x12.50 on 9" wide wheels with 0 offset with no trimming; a -18 offset will require minor trimming.

Notes

Use of the Auto 4 Hi feature is not recommended. Not compatible with rear mono-leaf springs or diesel applications. Single cab configuration has not been validated by ReadyLIFT.