3.5-Inch Component Box with Upper Control Arms, Silverado 1500

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3.5-Inch Component Box with Upper Control Arms, Silverado 1500, fitment-checked

A two-year fitment (the 2017-2018 Silverado 1500 and Sierra 1500) with upper control arms in the box. Supplied against part number C17350A; shocks are ordered separately.

GM changed these trucks either side of this window, so the two-year application is a real constraint rather than an oversight. The box carries 3.5 in. of lift hardware with upper control arms, which are what keep the alignment recoverable at that height. It is supplied against part number C17350A. 48.9 lb boxed. If you want the damping included, the complete kit in the same range bundles remote reservoir shocks.