Can I Install the Roadmaster Baseplate on My 2021 Sierra 1500 That Has an Aftermarket Bumper

Updated 01/08/2026 | Published 01/07/2026

Products Featured in This Question

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

(2170)

$575.00

Question:

Can you tell me if Roadmaster base plates part RM-523198-4 will fit a 2021 GMC Sierra 1500 4-wheel drive with an aftermarket bumper. I have photos of the bumper. I am trying to locate the manufacturer of the bumper at this time.

asked by: James P

Expert Reply:

Hey, James.

The baseplates that we carry, including Roadmaster part # RM-523198-4 are designed to fit on a 2021 GMC Sierra 1500 with the OEM bumper. Depending on how different the aftermarket bumper is, you will need to make modifications to the bumper for the base plate to fit.

You can check if there is anything in the way on your bumper where the baseplate arms stick out. The arms are 18.25" from the ground. I included a picture of the front of the vehicle as well as a picture of what it looks like on the frame of the vehicle with the bumper off. That way you can see where it mounts and how it may affect the bumper you have.

expert reply by: Gwendolyn Y