4'' Big Lift Kit 2025 1500 Trail Boss / AT4

The 4'' Big Lift Kit for the 2025 GM 1500 Trail Boss / AT4 delivers a true 4-inch lift with rugged ReadyLIFT engineering, featuring boxed steel front/rear cross members and a full-width front skid plate cut from 3/16" plate steel.

• New 1/4-inch boxed plate steel differential drop brackets with a double gusset and boxed center rib to resist front differential torsional twisting.
• 4" lift kit includes heavy-duty angled and offset top mount strut extensions that realign the struts to optimize shock performance and minimize wear.
• Specially designed lower mount strut pre-load spacer provides a slight increase in spring rate to better handle the larger wheels and tires this lift enables.
• To lift the rear, new fabricated steel rear blocks with integrated bump stop landings and new rear shock extensions are included.

Thousands of miles of road and trail testing have proven this Big Lift Kit for the 2025 GM 1500 rides better than stock.

Compatibility: designed for 2025 GM 1500 4WD trucks, including Trail Boss and AT4 models, with durable, purpose-built components to support aggressive wheel and tire configurations.