Go Rhino RB20 Slim Line running board kit for 2015–2019 GMC Sierra 2500/3500HD Crew Cab includes a protective bedliner finish and provides a slim, Raptor-inspired full-length step that guards panels and increases ground clearance. Constructed from 16-gauge zinc-coated galvanized steel, the bullet-stamped tread is about 5½" wide. Mounting brackets are supplied and the boards carry a Limited Lifetime materials warranty with a 5-year warranty on the textured finish.
Go Rhino 15-19 GMC Sierra 2500/3500HD CC 4DR RB20 Slim Running Boards Kit (w/Brackets) - Bedliner Ct