1999-2021 GMC Sierra 1500 Rear Suspension Lift Blocks 2WD 4WD | SUPREME'S NEW HD STEEL BLOCKS - 9/16 PIN! Block Size:5" Tall Blocks - 9/16 Pin IMPORTANT: This kit may require

IMPORTANT: This kit may require extended U-Bolts for overloads

IMPORTANT: Pro4X model will NOT fit 3" or 3

4x Add-A-Leafs

* For a safe and easy installation process we included our U-Shaped Torsion Max Tool designed to safely release the tension on the front torsion bar

Increase the ground clearance on your X3 and make room for bigger tires for true all terrain capabilities

1999-2021 GMC Sierra 1500 Rear Suspension Lift Blocks 2WD 4WD | SUPREME'S NEW HD STEEL BLOCKS - 9/16 PIN! Block Size:5" Tall Blocks - 9/16 Pin IMPORTANT: This kit may requireIncludes 2 Rear Lift Blocks Specifically designed for vehicles equipped with factory lift blocks. Precision Laser Cut for Outstanding Performance and Quality. 1 Piece CNC Formed Steel Frame for Maximum Strength and Stability. Heavy Duty GMAW Seam and Fillet Welding Processes to Ensure Maximium Resistance. Built In Tapper to Optimize Pinion Angles and Preserve Stock Ride Quality. Reinforced 9 16th Center Pin to Ensure Stability and Easy Installation.