78823 Heavy Duty Torsion Bar Unloader 2011+ Astro Pneumatic Late Model GM DescriptionThe 78823 Heavy Duty Torsion Bar Unloader 2011+ Astro Pneumatic Late Model GM features a forged alloy design with 1” hex drive bolt. Needed to service torsion arm and front suspension on many 2011 and newer full-size GM trucks. The larger c-frame opening on the 78823 Heavy Duty Torsion Bar Unloader 2011+ Astro Pneumatic Late Model GM accommodates the larger torsion bar on these trucks, holding it in place while you loosen or tighten the adjusting nut.