2020-2026 GMC Sierra 3500HD Running Boards & Side Steps

Exterior accessories built for the 2020-2026 GMC Sierra 3500HD, including SLE, SLT, AT4, and Denali trims in both single and dual-rear-wheel configurations. Shop fender flares, running boards, bug deflectors, mud flaps, and grille inserts from brands like Bushwacker, AMP Research, WeatherTech, and Husky Liners.

Will these accessories fit the dually fenders on my 3500HD? Yes -- fender flares, mud flaps, and running boards in this collection are filtered to match SRW or DRW configurations, so the parts you see fit your exact axle setup.

Verified fitment for your Sierra 3500HD, no guesswork.