ReadyLift Xtreme-Duty Fabricated A-Arm Kit
Fits 2011-2019 6.6L Duramax V8 (LML) · 6.6L Duramax V8 (L5P)
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Laser-cut, CNC-bent 4130 chromoly replacement upper control arms with self-lubricating bushings and 1-ton spring-loaded ball joints, taking the place of the stock stamped-steel arms.
why this one — The right fix if you have already levelled a 2011-2019 Sierra HD and the factory upper arms are binding or eating ball joints, and one part number covers both the GMT900 and K2 bodies plus 2WD and 4WD. Honest downsides: ReadyLift has not validated Single Cab fitment or drivability, it is a 6-hour job, and it needs an alignment afterward that is not in the price.
- Requires: Fits 2WD and 4WD. ReadyLift states Single Cab configuration has not been validated for fitment and drivability.
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