Collection: 2020-2026 GMC Sierra 3500HD Bed Extenders

Bed extenders engineered to fit the 2020-2026 GMC Sierra 3500HD, including 6.9-foot and 8.2-foot bed configurations. Choose from tailgate-mounted flip-style extenders by AMP Research BedXtender HD and hitch-mounted options that add roughly two feet of usable cargo length for ATVs, dirt bikes, and lumber.

Do I need to drill my truck bed to install one? No. Tailgate-mounted extenders bolt to existing factory holes in the bed rails, and hitch-mounted versions slide into your standard 2-inch receiver -- no drilling, cutting, or permanent modification required.

Verified fitment for your Sierra 3500HD, no guesswork.