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This custom underbed rail kit keeps your bed completely open once the hitch is removed. The 4 mounting holes sit flush with the bed surface, so there are no bulky rails or brackets left behind. It’s a clean setup that gives you full use of your bed for hauling when you’re not towing.
The brackets bolt to the outside of the frame rails and match the truck’s layout, which cuts down on drilling and installation time compared to universal kits. The crossmembers sit on top of the frame, under the bed, providing strong support for your hitch. Everything is built from black powder coated steel for corrosion resistance, and the kit includes all the rails and mounting hardware you need.
Designed specifically for Demco’s Underbed Mount Series (UMS), this kit provides a solid foundation for both fifth wheel and gooseneck towing setups. It’s compatible with hitches like the Hijacker Autoslide and Demco UMS Gooseneck models, so you can switch between towing styles without changing the base rails. Plus, it comes backed by a 5-year limited warranty for added confidence.
Customer Satisfaction Score:
79% were satisfied with this product
21% of customers were not satisfied
Ratings & Reviews
Part arrived on time complete. Item matched the description.
Good product. Easy install. Would give it five stars except you DO HAVE TO DRILL holes in your frame. That was a little disappointing. Other than that great product.
Well packed, the delivery was faster than I anticipated. I should have my new truck in a couple of days so I can complete the mounting.
Company and all personnel were awesome to work with .. I guess the install kit with bolts and instructions got ripped out of cardboard box.. the hitch came freight with no issues .. I like the hitch and product so far … I did receive the bolts and install kit a week later .. still did not have instructions with it .. but can get those online I think .. overall please so far with the experience thx
I had an old hitch kit in my older truck. The truck company changed the design of my new truck. I called etrailer sales and they gave me the part number for the updated kit. They knew of the change and had the design in stock. They shipped the new one right off. In fact I got it sooner then I needed it as it was in the middle of the winter. All the parts were there and it went in nicely and work great.
I think etrailer can't find the correct frame brackets for my 2024 chevy 2500hd. As the most recent order is NOT CORRECT and my c.c. has roughly 3k on it and still no Remco 18k autoslide installed yet!!!??
UPS delivery damaged first delivery and returned it to sender.
I contacted E Trailer and they immediately sent a replacement. I received it sooner than expected.
Excellent customer service.
Item was a Demco DR37FR under frame 5th wheel hitch mount installation kit.
Steve B.
10/1/2024
Absolutely great.
Do you have a question about this 5th Wheel Hitch Rail?
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Lazer S.
4/28/2026
Sorry to hear that, Robert. Can I ask why your mechanic is saying these frame brackets are incorrect for your 2024 Silverado 2500? I checked with Demco and they are a fit for your truck. If it's because the instructions say 2020 on them, that is just due to them not being updated because the install is the same for newer trucks as well. If this is the reason your mechanic is saying they are wrong, he is costing you money and I would really find a different mechanic to do the install.