Shop aftermarket running boards, nerf bars, and side steps for 2015-2019 GMC Sierra 3500HD trucks. Choose the correct Crew Cab, Double Cab, or Regular Cab application first, then compare step profile, width, material, finish, dimensions, and product photos.
Shop Sierra 3500HD Running Boards by Cab
Compare Step Styles
Live products include traditional running boards, nerf bars, hex-step, diamond-step, drop-step, and off-road-style designs where listed. Product titles show 5-inch, 6-inch, and selected 7-inch widths in black, stainless-finish, white, or black-aluminum configurations. Some listings use narrower 2015-2017 or 2015-2018 ranges, so the individual product page controls.
Shop Drop-Step Style
2015-2019 GMC Sierra 3500HD Drop-Step Nerf Bars
Shop 5-Inch Style
2015-2019 GMC Sierra 3500HD 5-Inch Running Boards
Shop 6-Inch Style
2015-2019 GMC Sierra 3500HD 6-Inch Running Boards
What to Verify Before Ordering
Match the product page to the exact model year, Sierra 3500HD designation, and cab configuration. Review any narrower year range, Duramax wording, rear-wheel restriction, dimensions, package quantity, included brackets or hardware, material, finish, and installation information.
2015-2019 GMC Sierra 3500HD Running Boards FAQ
How do I verify running-board fitment for my Sierra 3500HD?
Confirm the exact model year and whether the truck is a Crew Cab, Double Cab, or Regular Cab. Choose a product page that specifically lists that combination and review any narrower year, Duramax, or rear-wheel notes.
Are the different cab applications interchangeable?
No. Cab length can change board length, brackets, mounting points, and step placement. Select a product made specifically for the truck’s cab configuration.
How do the available step styles compare?
Traditional running boards generally provide a continuous stepping surface, while nerf bars, hex-step, diamond-step, and off-road designs use different profiles. Drop-step products position the stepping area lower. Compare dimensions and photos before choosing.
What should I check before ordering or installation?
Review exact year and cab fitment, package quantity, included brackets or hardware, dimensions, material, finish, and installation information. Contact People Auto Parts with the vehicle details and product link if anything is unclear.
Aftermarket trademark disclaimer: People Auto Parts is not affiliated with, sponsored by, or endorsed by General Motors LLC. GMC, Sierra, GM, Duramax, and related 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.
