Extension Bracket Options for Factory Running Boards on 2024 GMC Sierra 3500 AT4

Updated 09/01/2026 | Published 08/26/2026

Question:

Hi there, I have a 2024 GMC Sierra 3500 AT4 truck and Im looking for different brackets for the running boards that came on my truck that would extend them so that my wife who is 5 1 can get in the truck easier

asked by: Brian H

Expert Reply:

Hey Brian!

We do not carry a replacement or drop-style bracket that will lower the factory running boards on your 2024 GMC Sierra 3500 AT4. If you want to keep the original running boards, you would most likely need to have custom brackets fabricated to move them farther down.

Since the main goal is making it easier for your wife to get in and out of the truck, I would consider replacing the factory boards with a power-retractable running board system instead. These automatically extend down and out when the door opens, giving you a much lower step than the factory AT4 boards, then tuck back up against the truck when the doors are closed.

If you’d like, I can help you find the correct power running board kit for your 2024 Sierra 3500. Do you have a Regular Cab, Crew Cab, or Double Cab model?

expert reply by: Jerry B