Power retractable running boards - need help IDIng a part

dustybundustbuster · 2026-08-30T10:22:57-0500

Truck is a 2019 Sierra Denali. The arms that move in and out to extend and retract the factory running boards have rubber bumpstops on them.

They’re there to give a soft stop when they open and close, and also to help make the running boards stable so they don’t rock in or out when opened and closed.

Mine are worn out and need to be replaced. They are made so they can be removed and replaced, but I can’t find a part number.

I attached a picture and circled in blue the part I’m referring to. Does anyone know the part number, official name of the part, where to find replacements (factory or aftermarket).

R467X · 2026-08-30T10:28:27-0500

If you can't find a part number it's very likely that GM does not sell it individually and you'll have to buy the entire assembly. Pull one off and see if there's a labeled part number on it. If there is, you might get lucky on eBay with someone selling it individually..

dustybundustbuster · 2026-08-30T10:31:36-0500

That’s a good idea. I may just remove it, get the bad rubber off, and make my own rubber or urethane bumper.

A dab of Gorilla Glue construction adhesive and it won’t be going anywhere.

R467X · 2026-08-30T10:35:13-0500

dustybundustbuster said:
That’s a good idea. I may just remove it, get the bad rubber off, and make my own rubber or urethane bumper.

A dab of Gorilla Glue construction adhesive and it won’t be going anywhere.

That might be a good idea too. I bent my fuel coolant line a while back doing exhaust work and that part had a clearly visible sticker. Called around some dealers and learned that they don't sell that individually anymore and that I'd have to spend $500 on the entire assembly. Lucked out on eBay some guy was selling the exact tube off a wrecked truck for $75