The ReadyLIFT 7-8 inch Adjustable Lift Kit for 2011-2018 GM HD trucks is a top-tier suspension solution that combines height with durability. It utilizes laser-cut and CNC-formed sub-frame assemblies to provide a precise, bolt-on fit, while nodular iron knuckles maintain perfect suspension geometry. Paired with tubular upper control arms and high-performance Bilstein 5100 shocks, this system is engineered to handle massive 37-inch tires while keeping your truck's factory handling and steering characteristics intact.

Features

• Adjustable front lift height from 7 to 8 inches via indexed forged torsion keys.
• Includes four (4) Bilstein 5100 Series Performance Shocks designed specifically for this kit.
• Tubular Upper Control Arms (UCAs) feature corrected ball joint angles for increased durability.
• CNC-machined nodular iron knuckles ensure factory-spec geometry and handling performance.
• Integrated differential drop bracket system maintains proper CV axle angles for 4WD applications.
• Components feature a Plascoat performance polymer alloy finish for extreme abrasion and impact resistance.
• Heavy-duty welded steel crossmembers and a 3/16-inch thick plate steel skid plate for underbody protection.
• Maintains factory ride quality and turning radius even with the increased height.

Notes

• Towing capacity will be reduced following the installation of this system.
• Designed primarily for 2WD use on public roads; 4WD use is recommended for off-road or slow-speed conditions only.
• A double cardan driveshaft may be required to eliminate high-speed 4WD driveline vibrations.
• Single Cab configurations have not been validated for fitment or drivability by ReadyLIFT.

Compatibility Notes

• Fits 2011-2018 (and some 2019) Chevy Silverado and GMC Sierra 2500HD/3500HD 2WD/4WD models.
• Single Rear Wheel (SRW) models may require custom U-bolts if equipped with a factory tow package.
• Will not fit Dual Rear Wheel (DRW) applications without custom-sourced U-bolts.
• Stock 20-inch wheels are compatible; however, stock 17-inch or 18-inch wheels cannot be used.

Tire Fitment

• Maximum Tire Diameter: 37 inches.
• Recommended Setup: 37x12.50 tires on a 9-inch wide wheel with 4.75" to 5.5" backspacing.
• 37x12.50 tires on a 9-inch wide wheel with -6 offset typically results in no rubbing.

Specs

• Lift Height: Adjustable 7 to 8 inches (Front) / 5 inches (Rear).
• Shock Type: Bilstein 5100 Series Monotube.
• Sub-frame Material: 1/4-inch laser-cut fabricated steel.
• Kit Contents: Forged torsion keys, iron knuckles, tubular UCAs, steel crossmembers, 5-inch cast iron rear blocks, Bilstein shocks, skid plate, and hardware.