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Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches
Demco

Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches

Part Number: DR37FR
In Stock
$486.36
Retail:$610.00
You Save: $123.64
5th Wheel Hitch Rails

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Custom, underbed rail kit allows for uninhibited use of your truck bed once your hitch is removed. Works with Underbed Mount Series (UMS) fifth-wheel and gooseneck hitches. Custom-fit frame brackets offer a simple installation. 1-800-940-8924 to order Demco 5th wheel hitch rails part number DR37FR or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches. 5th Wheel Hitch Rails reviews from real customers.
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  • Reviews (12)
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Demco 5th Wheel Hitch Rails - DR37FR

  • Below the Bed
  • Custom
  • Demco

Custom, underbed rail kit allows for uninhibited use of your truck bed once your hitch is removed. Works with Underbed Mount Series (UMS) fifth-wheel and gooseneck hitches. Custom-fit frame brackets offer a simple installation.


Features:

  • Installation kit is designed for use with Demco UMS 5th-wheel and gooseneck hitches
  • Underbed rails allow for complete access to truck bed when hitch is removed
    • No exposed rails
    • 4 Mounting holes sit flush with truck bed
  • Vehicle-specific design reduces installation time and requires less drilling than universal systems
    • Brackets bolt onto the outside of your truck's frame rails
    • Crossmembers sit along top of frame rails, beneath bed
    • Drilling required for installation
  • Sturdy, black powder coated steel resists corrosion
  • Rails and installation hardware included
  • Made in the USA


Specs:

  • Application: Demco Underbed Mount Series (UMS) 5th-wheel and gooseneck trailer hitches
  • 5-Year limited warranty


8551012 Demco Hijacker UMS Under Bed Rail Frame Bracket Kit

Installation Details DR37FR Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.8

12 reviews
Custom, underbed rail kit allows for uninhibited use of your truck bed once your hitch is removed. Works with Underbed Mount Series (UMS) fifth-wheel and gooseneck hitches. Custom-fit frame brackets offer a simple installation.

by:
2024 Chevrolet Silverado 2500

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. profile picture

Steve B.

10/1/2024

Absolutely great.



by:

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



by:

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.



by:

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.



by:
2001 Ford Excursion

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.



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Part arrived on time complete. Item matched the description.



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2022 GMC Sierra 2500



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See what our Experts say about this Demco 5th Wheel Hitch Rails

  • Underbed Mounting Kit For Reese Elite 5th Wheel Hitch That Fits My 2022 Chevrolet Silverado 3500
    I spoke with a representative from Resse Products. I was informed that Reese has not had an underbed mounting option for the Chevrolet Silverado 2019. You can use the Reese Quick-Install Custom Outboard Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches, part # RP84FR, but it is an above the rail option. This is a universal mounting kit that will be compatible with your Reese Elite 5th wheel hitch. I have included a product description link below.
    view full answer...
  • 2022 GMC Sierra 2500 Recommended Underbed Kit to Tow 5th Wheel Trailer
    The underbed hitch system I recommend for your 2022 GMC Sierra 2500 is the B&W Gooseneck Hitch # BWGNRK1020-5W that can be paired with the Sliding # BWRVK3400-5W or Stationary # BWRVK3500-5W B&W Companion 5th wheel hitch since there isn't a standard aftermarket puck system for your truck. We do have the Demco kit # DR37FR which looks more similar to the OEM puck kit, but Demco designed this to only work with their 5th wheel hitches as a direct connection so you'll get a lot more use out...
    view full answer...
    Image 1 for
  • Parts Needed To Convert A Demco Autoslide 5th Wheel Hitch To A Below-Bed Mount
    Yes, you'll just need to order the correct underbed rails and new side mounting plates for the Demco Autoslide 5th Wheel Trailer Hitch # DM8550035. For a 2022 Chevy Silverado 2500 you'd need the Underbed Rail and Installation Kit for Demco UMS 5th Wheel # DR37FR. For the hitch you'd have to unbolt the side plates and swap on the Replacement Side Plates for Demco Autoslide 5th Wheel Trailer Hitches # DM6004. The levers will make connecting to the underbed rails quick and simple. I also...
    view full answer...
  • Does B&W Make An Auto-Sliding Fifth Wheel Hitch
    B&W currently only has an manually activated slider with their Companion # BWRVK3400-5W or Patriot # BWRVK3270. With these being manual you would need to exit the cab of your 2022 Chevy Silverado and pull the lever to activate the slide on you hitch, complete your turn, and then get back out and relock the hitch back in place. To avoid the headache of having to exit the truck repeatedly you can instead use the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550022 with...
    view full answer...
  • Does Demco Underbed Kit Give Full Bed Access for 2021 Chevy Silverado 2500
    The Underbed Rail and Installation Kit # DR37FR is a great way to keep the bed of your 2021 Chevy Silverado 2500 short bed clean when you aren't towing your 5th wheel. It comes with plugs for the 4 attachment points so you don't have to worry about them filling up with debris either. This 4-point mounting system is compatible with the Demco Hijacker Autoslide which is available as an 18K Model # DM8550022 as well as a 21K Model # DM8550037. These are a great option for your short bed pickup...
    view full answer...
    Image 1 for
  • Should I Choose Demco, Reese, or PullRite Underbed Rail System for My 2020 Chevy Silverado 2500
    For your application I recommend installing the Demco UMS Underbed Rail Kit # DR37FR on your 2020 Chevy Silverado 2500 and using the Hijacker Autoslide # DM8550037. The reason behind this is twofold; the Hijacker has more height adjustability and it comes with capture plates (as opposed to sold separately), and then Reese doesn't have an underbed rail system for your truck so you'll have to use the matching underbed rails for the 5th wheel hitch. Since the Demco Hijacker is better than...
    view full answer...
  • Best Towing Option For A 2022 Keystone Montana 3121RL Pulled With A 2021 GMC Sierra 3500 6-3/4 Bed
    The Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP85FR is only going to be roughly 3/4" longer from the 5th wheel pin box that comes standard on your 2022 Keystone Montana 3121RL. For this reason I do not recommend using this when towing with your 2021 GMC Sierra 3500 with the standard length bed. To make it simple the rear axle center line is approximately 42" from the cab of your Sierra. The Montana is 8' wide, at a full jackknife turn 6" of your Sierra is going...
    view full answer...
  • Is There an Underbed 5th Wheel Hitch Option for a 2020 Chevy Silverado 2500 Without Pucks
    Yes, there are two underbed mounted fifth wheel hitch options for a 2020 Chevrolet Silverado 2500 but each of which are designed to work with their own hitches. These two options are from B&W and Demco. The B&W Companion part # BWRVK3400-5W and part # BWGNRK1020-5W or the Demco Hijacker part # DM8550034 and part # DR37FR. The main difference is the auto sliding feature on the Demco Hijacker so that is my recommendation. Unfortunately, there would be no way to use the B&W Companion OEM...
    view full answer...
  • Underbed Rail and Installation Kit for Demco Hijacker & 2020 GMC Sierra 2500
    I suggest the Underbed Rail and Installation Kit for Demco Hijacker UMS 5th Wheel and Gooseneck Trailer Hitches Item # DR37FR. This custom fit, under bed rail kit allows for uninhibited use of your truck bed once your hitch is removed. Works with Hijacker Under bed Mount Series (UMS) fifth-wheel.
    view full answer...
  • Is Demco DR37FR Under Bed Rail System Compatible Wtih B&W or Curt 5th Wheel Hitches
    The Demco # DR37FR Underbed Rail Kit you'd looked at is only compatible with the Demco Hijacker Underbed Mount Series (UMS) 5th-wheel and gooseneck trailer hitches such as: • Hijacker UMS Gooseneck Hitch # DM5988 • Hijacker UMS 20K Double Pivot 5th Wheel Hitch # DM8550032 • Hijacker 18K Autoslide # DM8550022 • Hijacker 21K Autoslide # DM8550037 For an underbed mount for a sliding B&W Companion hitch like # BWRVK3400-5W, you'd need their Turnover Ball Gooseneck hitch like # BWGNRK1020-5W I've...
    view full answer...
  • Recommended Underbed 5th Wheel System and Sliding Hitch for 2021 Chevy 2500 Compatibility
    There is not currently a non-OEM underbed puck system compatible with your 2021 Chevy 2500. The Reese Elite underbed pucks are what fit your Ford compatible Sliding 5th wheel hitch, but they have not yet made a compatible system for the new model Chevy/GM trucks as of 11/2020. Unfortunately that means there isn't currently a fit compatible with your hitch for your truck so another option will need to be considered. My recommendation for a clean bed and sliding hitch for your truck is...
    view full answer...
  • Demco Highjacker Mounting System For a 2021 Chevrolet Silverado With 6-3/4' Bed Without OEM Puck Pkg
    The Demco Hijacker Autoslide 5th Wheel Trailer Hitch # DM8550037 requires multiple mounting points on the frame of your 2021 Chevrolet Silverado 2500. Therefore you will not be able to use the Curt X5 5th Wheel Base Rails Adapter # 16310. No autoslide 5th wheel hitches can be used with a single point mount such as a B&W turnover ball or Curt double lock gooseneck. The Underbed Rail and Installation Kit for Demco Hijacker # DR37FR will allow you to keep a clean bed when you do not have...
    view full answer...
  • Recommended Fixed 5th Wheel Hitch For A 2022 GMC Sierra 2500 With A Short Bed
    The best 5th wheel hitch for your 2022 GMC Sierra 2500 with the short/standard bed will depend on if you have the factory pucks in the bed or not. If you don't, the Reese M5 5th Wheel Trailer Hitch - Single Jaw - 20,000 lbs # RP30928 and Rail Kit # RP30035-522 would be a great option. Now if you do have the factory pucks in your bed, I highly recommend the B&W Companion OEM 5th Wheel Hitch # BWRVK3715. This is American made and also rated up to 25,000 pounds. This will also secure into...
    view full answer...
  • Parts Needed For Installing Demco DM8550022 Auto Slide 5TH Wheel Hitch on 2022 Chevy Silverado 2500
    To install the Demco Hijacker Autoslide 5th Wheel Trailer Hitch # DM8550022 on your 2022 Chevrolet Silverado 2500HD you will need the Underbed Rail and Installation Kit # DR37FR. This kit is custom fit for the short bed on your Silverado and will not require drilling on your frame rails to install the brackets. Drilling must be done on the bed itself for the 2" openings required for the mounting points. I recommend installing the Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring...
    view full answer...
  • Converting Demco Hijacker UMS Double Pivot 5th Wheel Hitch to 2020 Chevy Silverado 2500 Short Bed
    Thanks for the photo, and we do have a solution for you here to convert your Demco Hijacker UMS Double Pivot 5th wheel hitch so you can use it in your Chevy. There are indeed underbed rails for your 2020 Chevy Silverado 2500 short bed that will allow you to mount the hitch, though you will need to swap out the side rails of the hitch in order to fit the underbed mounting brackets. So, here is exactly what you will need for your '20 Silverado 2500: - Underbed Rail and Installation Kit for...
    view full answer...
    Image 1 for
  • Under Bed Rail Kit for Demco DM8550022 Auto Slide 5th Wheel Hitch on 2020 Chevy Silverado 2500
    We'd be glad to help you with that. Demco does make an under-bed rail kit that's compatible with their # DM8550022 Hijacker Autoslide hitch that will work with your 2021 Chevy Silverado 2500. You'll want to use the # DR37FR under bed rail kit. I've linked to the installation instructions for you. The Hijacker Autoslide is a great choice, and will be very convenient as you won't need to get out of the truck to manually actuate the slider. If you'd like an in-bed 7-way trailer connector...
    view full answer...
  • Sliding 5th Wheel Hitch Recommendation For A 2020 GMC Sierra 2500HD AT4 Short Box
    Yes, you will need a sliding fifth wheel hitch to give you the clearance you need. I recommend the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550034, which features a pivoting head to allow for easy hookup and disconnect. This hitch also provides 14" of additional clearance for tight turns. A normal sliding hitch will cause you to get out of your vehicle to manually move your hitch for each turn you want to make. Since the Demco Hijacker is an automatic sliding hitch,...
    view full answer...
  • Recommended 5TH Wheel Hitch System For a 2021 GMC Sierra 2500 Short Bed Without Factory Puck/Prep
    I have another recommendation for you as I have heard a lot of complaints about the Curt CrossWing # C32DR and the amount of noise it makes. I also do not feel the offset is going to be enough to prevent damage between your truck and trailer when maneuvering. I recommend going with the Demco Autoslide 5th Wheel Trailer Hitch # DM8550022 on your 2021 GMC Sierra 2500. This uses the Demco UMS System # DR37FR which places the rails under your bed so you can maintain the clean bed when you...
    view full answer...
  • Under Bed Mounting System For 5TH Wheel/Gooseneck Towing With a 2023 Chevrolet Silverado 2500
    Yes, the Demco Underbed Rail and Installation Kit # DR37FR will fit either the short or long bed on your 2023 Chevrolet 2500. These will allow you to use Demco UMS series 5th wheel hitches like the Autoslide 5th Wheel Trailer Hitch # DM8550037. We also have the Gooseneck Trailer Hitch # DM5988 for towing a gooseneck trailer.
    view full answer...
  • Custom Fifth Wheel Rail and Bracket Kit For 2020 GMC Sierra 2500 6-3/4 Ft Bed
    The custom bracket kit for your 2020 GMC Sierra 2500 6 3/4 Foot bed is part # DR37FR to use your existing Demco Hijacker part # DM8550034 in your new truck.
    view full answer...
  • Which Auto-Slider Hitch for 2021 Chevy Silverado 3500 Compatible with Underbed Mounting Kit
    I have a solution for you, but there is not an aftermarket OEM puck style system for your 2021 Chevy Silverado 3500. However, you can use the Demco Hijacker Auto-slide Hitch 21k # DM8550037 with the underbed mounting kit # DR37FR to give you exactly what you're looking for. The Hijacker Auto-slide is a great choice that you'll never have to worry about getting out of the truck to engage the slider. The Underbed Rail and Installation Kit for Demco Hijacker UMS 5th Wheel and Gooseneck Trailer...
    view full answer...
  • Is Sliding 5th Wheel Hitch Necessary for 2022 GMC 2500 Short Bed Towing Montana 3741FK 5th Wheel
    I've checked out photos of your 5th wheel, and since the front corners of your 5th wheel aren't dished or concaved in, I'd recommend using a sliding hitch to prevent the 5th wheel from contacting your truck cab during turns. The Demco Hijacker Autoslide would be a great choice for you, which would eliminate the need to exit the vehicle to disengage the slider for low speed maneuvering. During turns, the hitch head will disengage and slide rearward to provide additional clearance to the...
    view full answer...
  • Demco Hijacker Autosliding 5th Wheel Hitch For A 2022 GMC Sierra 2500 Short Bed
    For your 2022 GMC Sierra 2500 short bed, I recommend the Demco Hijacker Autoslide 5th Wheel Hitch # DM8550034 and the Demco 5th Wheel Rail Adapter # DM6333. This hitch has a maximum towing capacity of 18,000 pounds, and a vertical load limit of 4,500 pounds and is a guaranteed fit for your 2022 GMC Sierra 2500 short bed. This kit will work if your truck has the OEM prep kit, if you do not have the OEM prep kit, then you need the uderbed rail kit # DR37FR as well.
    view full answer...
  • Best Sliding 5th Wheel Hitch & Underbed Rails For 2020 Chevy 2500 Short Bed
    Hi McKay, We can get your 2020 Chevy Silverado 2500 short bed completely set up with a sliding 5th wheel hitch as well as underbed rails that are hidden so your bed is clean when you aren't using the hitch. The best option for this by far is the Demco Hijacker Autoslide because of its convenience and superb jaw system. What you need is the following: - Demco Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550022 - Underbed Rail and Installation Kit # DR37FR The Autoslide is awesome...
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Dustin K
Video Edited:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Justice A
Updated by:
Justice A
Employee Kristina F
Written by:
Kristina F

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