Shop 6-inch running boards and nerf bars for listed 2007-2014 GMC Sierra 3500HD Extended Cab applications. This collection is narrowed to current in-stock products listed for the Sierra 3500HD, Extended 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: Extended Cab, Crew Cab, and Regular Cab applications are not interchangeable. Verify the exact cab, supported years, dimensions, brackets, package contents, and exclusions before checkout.
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Frequently Asked Questions
Will every item fit every 2007-2014 Sierra 3500HD Extended Cab?
No. Current listings can support different portions of the 2007-2014 range. Confirm the exact supported years on the individual product page.
Does 6-inch establish fitment?
No. The 6-inch description refers to the listed step or board style. Exact model, year, cab configuration, brackets, and exclusions still matter.
Are these genuine GMC OEM parts?
Unless an individual product page explicitly states otherwise, these are aftermarket parts selected for the listed applications.
What should I verify before ordering?
Confirm the exact year, Sierra 3500HD model, Extended Cab configuration, dimensions, finish, included brackets or hardware, and product-page exclusions.
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.
