Go Rhino RB20 Slim Line running board kit for 2015–2019 GMC Sierra 2500/3500HD Crew Cab Diesel supplies a slim, protective full-length step that tucks close to the cab for improved ground clearance. The modern bullet-stamped tread is approximately 5½" wide and the boards are formed from 16-gauge zinc-coated galvanized steel. The kit includes mounting brackets and is backed by a Limited Lifetime materials warranty plus a 5-year finish warranty.
Go Rhino 15-19 GMC Sierra 2500/3500HD CC 4DR Dsl RB20 Slim Running Boards Kit(w/Brackets) - Tex. Blk