2020-2026 GMC Sierra 3500HD Engine & Performance

Engine and performance parts engineered for the 2020-2026 GMC Sierra 3500HD, covering both 6.6L Duramax L5P diesel and 6.6L L8T gas powertrains. Shop cold-air intakes, EGR coolers, turbo accessories, exhaust components, and tuning hardware from brands like S&B, AFE, and Banks.

Will these mods void my powertrain warranty? No -- under the Magnuson-Moss Warranty Act, GM cannot void your warranty unless the part is proven to cause the failure. Stick to 50-state legal CARB EO parts for full coverage.

Verified fitment for your Sierra 3500HD, no guesswork.