Shop 6-inch running boards and nerf bars for listed 2015-2019 GMC Sierra 2500HD Double Cab applications. This collection is narrowed to current in-stock products listed for the Sierra 2500HD, Double Cab configuration, and a 6-inch step or board style. Confirm the exact supported model years on the individual product page before ordering.
Fitment first: Double Cab, Crew Cab, and Regular Cab applications are not interchangeable. Verify the exact cab, supported years, dimensions, and package contents before checkout.
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Frequently Asked Questions
Will every item fit every 2015-2019 Sierra 2500HD Double Cab?
No. Confirm the exact supported model years and Double Cab application on the individual product page.
Does 6-inch establish fitment?
No. The 6-inch description refers to the listed step or board style. Exact truck model, year, cab configuration, brackets, and exclusions still matter.
Are Duramax and gasoline applications always interchangeable?
Do not assume so. Some listings call out a Duramax or other application detail. Use only a product page that explicitly supports your truck configuration.
Are these genuine GMC OEM parts?
Unless an individual product page explicitly states otherwise, these are aftermarket parts selected for the listed applications.
Aftermarket trademark disclaimer: People Auto Parts is not affiliated with or endorsed by General Motors or GMC. GMC and Sierra names are used only to identify compatibility. Unless a product page explicitly states otherwise, items in this collection are aftermarket parts and are not genuine OEM components.
