2021 GMC Sierra 2500 Puck System Availability
Updated 08/15/2025 | Published 07/28/2025
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Question:
I have a 2021 GMC 2500 and wanting to install a underbed puck system. What part number am I looking for ?
asked by: Mark S
Expert Reply:
Hey Mark, thanks for reaching out!
For underbed systems we have the Demco Kit # DR37FR and the B&W Gooseneck Hitch # BWGNRK1020 that fit your 2021 GMC Sierra 2500.
The Demco kit is pretty specific to Demco brands, while the B&W can be a little more flexible and work for a few different applications depending on the parts, so I recommend the B&W.
If you're wanting the OEM puck system, you'll need to reach out to your local GM dealer and see if that's something they can facilitate.
What are you planning on using the puck system for?
Product Page this Question was Asked From
Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches
- 5th Wheel Hitch Rails
- Custom
- Below the Bed
- Demco
more information >
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on 5th Wheel Hitch Rails
Jon G.
8/15/2025
Hey Mark, did you decide on the B&W Gooseneck Hitch or are you still considering the OEM puck system from your GM dealer? I'm curious because your choice could help others with similar trucks.