Recommended 5th Wheel Brackets and Rails for a 2021 GMC Sierra 1500
Updated 04/20/2026 | Published 04/15/2026
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Question:
I have a BandW Patriot 18k slider 5th wheel hitch. Im looking at installing it in a 2021 GMC Sierra with a 53/4 bed. I need the rails and mounting brackets, but I cant seem to find that product on the website that fits this truck. Can you assist?
asked by: Ryan M
Expert Reply:
I sure can Ryan. To add a set of 5th wheel rails to your 2021 GMC Sierra 1500 with a 5-3/4' bed you'll need the following parts:
Base Rails for 5th Wheel Trailer Hitches item # BWRVR3210
Custom Mounting Brackets for Above Bed Base Rails item # BWRVR2504
The item # BWRVR2504 brackets are custom fit and will install in preexisting holes in your Sierra's frame. The hardware included will attach the brackets to the item # BWRVR3210 rails inside your bed. Your Patriot Slider item # BWRVK3270 will attach directly to them.
What kind of 5th wheel trailer are you towing?
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Product Page this Question was Asked From
B&W Custom Mounting Brackets for Patriot 5th Wheel Above Bed Base Rails
- Accessories and Parts
- 5th Wheel Hitch Rails
- Brackets
- Custom
- B and W
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