Compare running boards and nerf bars for 2020-2027 GMC Sierra 3500HD trucks by confirming the exact model year and cab configuration on the individual product page. Current live products reviewed for this collection are labeled through 2026, so collection architecture does not establish 2027 SKU-level fitment.
2027 availability: This collection is reserved for confirmed 2027 GMC Sierra 3500HD products. Compatible products will be added as they become available in the coming months. Until then, check the individual product page for the exact supported model years before ordering.
Fitment First
Match Crew Cab, Double Cab, or Regular Cab exactly as listed. Then verify the product's stated year range and application notes. Only after fitment is confirmed should you compare board width, step profile, material, finish, dimensions, package contents, and installation information.
Shop Sierra 3500HD by Cab
Shop Cab-Specific 6-Inch Running Boards
Shop by Width & Related Collection
2020-2027 GMC Sierra 3500HD Running Boards FAQ
Does every product on this page fit a 2027 Sierra 3500HD?
No. Current reviewed products are labeled through 2026. For a 2027 truck, use only a product page that explicitly lists 2027.
What should I verify before choosing a running board?
Confirm the exact model year, Sierra 3500HD designation, cab configuration, and any product-specific application note before comparing styles.
Can different cab configurations use the same running boards?
Do not assume they can. Choose a product specifically listed for the truck's cab configuration.
What should I check before installation?
Review package contents, brackets or hardware, dimensions, mounting application, exclusions, and installation notes on the individual product page.
Aftermarket trademark disclaimer: People Auto Parts is not affiliated with, sponsored by, or endorsed by General Motors LLC. GMC, Sierra, Sierra 3500HD, GM, and related names and trademarks belong to their respective owners and are used only to identify compatible applications. Products are aftermarket parts unless an individual listing expressly states otherwise.
