Tuff Country 16993KN 6" Lift Kit with Knuckles and 3 Piece Sub-Frame with SX8000 Shocks

The Tuff Country 16993KN 6" Lift Kit with Knuckles and 3 Piece Sub-Frame with SX8000 Shocks is a bolt‑on suspension upgrade designed for 2001–2010 GM 4WD heavy‑duty pickups (Chevy Silverado 2500HD and GMC Sierra 2500HD). It delivers a confident 6" front lift and 4" rear lift to clear up to 35" tires while maintaining a smooth, factory‑like ride.

• Shocks included: Four SX8000 shocks are included for balanced damping and improved travel across pavement and tough terrain.
• New steering knuckles: Knuckles eliminate the need to drop upper control arms, simplifying installation and preserving steering geometry.
• 3‑piece sub‑frame: Multi‑piece design allows for easier alignment and installation, reducing installation complexity.
• Cross members and skid plate: Includes front/rear cross members and a skid plate to protect undercarriage and provide solid mounting points.
• Axle and differential hardware: Differential drop brackets, torsion bar drop brackets, and axle spacers maintain proper drivetrain geometry after lifting.
• U‑bolts and lift blocks: U‑bolts and 4" cast iron lift blocks ensure secure wheel positioning and robust axle support.
• Carrier bearing drop kit: Keeps driveline angles correct, preventing aftermarket rubbing or vibrations at higher lifts.
• Brake line relocation kit: Maintains safe brake hose routing and clearance once the vehicle is lifted.
• Lateral compression arms and mounts: Additional control arms and mounts enhance stability and articulation on uneven terrain.
• Finish and durability: Black powder coat finish resists corrosion and stands up to off‑road use.
• Tire and wheel compatibility: Supports up to 35" x 12.50" tires; rim backspacing must be 4.5" or less (new rims required).
• Installation time: Average install time is 8–10 hours for a complete bolt‑on process.
• Warranty: Backed by Tuff Country’s limited lifetime warranty for long‑term confidence.
• Fitment scope: Specifically designed for 2001–2010 Chevy Silverado 2500HD 4WD and GMC Sierra 2500HD 4WD (will not fit dually models).
• Important installation notes: Factory length shocks must be replaced with extended shocks (the kit includes SX8000s); factory rims will not fit with this lift; exhaust modification may be required on gas engine models for proper clearance.

This lift kit is ideal for avid off‑road enthusiasts who want enhanced ground clearance and the ability to run large tires without compromising on‑road manners. It combines rugged durability with a thoughtful, user‑friendly design—delivering improved approach and departure angles, better articulation, and a confident overall ride while preserving essential drivetrain geometry. With a proven 35+ year track record from Tuff Country and a limited lifetime warranty, it’s a reliable way to upgrade your GM heavy‑duty pickup for serious terrain and everyday reliability alike.