Features and Benefits GM Torsion Bar Unloader Drop forged frame This tool is required to safely release the tension on the front suspension torsion bar to service the front suspension Larger design to cover the 2011 and newer GM Trucks including HD C/K When servicing the lower control arm of the front suspension on GM trucks or replacing a torsion bar, it is necessary to remove the spring pressure from the suspension Covered by a 1-year warranty.