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2016 Fiat 500X
Demco
Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches
Part Number: DR37FR
In Stock
$504.49
Retail:$676.00
You Save: $171.51
2016 Fiat 500X
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- All Info
- Reviews (13)
- Q & A (0)
- Photos
Demco 5th Wheel Hitch Rails - DR37FR
Highlights
- Custom Fit for Your Vehicle: Mounting brackets install to your truck's frame.
- Keeps Your Truck Bed Clear: Underbed rails sit below the surface, leaving the bed fully usable when the hitch is removed.
- Works with Demco UMS Hitches: Compatible with Demco Underbed Mount Series 5th-wheel and gooseneck hitches for a clean, integrated setup.
- Simplifies Installation: Custom-fit frame brackets reduce drilling and cut install time compared with universal kits.
- Built for Long-Term Use: Black powder coated steel resists corrosion and stands up to heavy towing demands.
- Includes Mounting Hardware: Comes with rails and hardware so you can complete the install without extra parts.
Features to know about
Full Bed Space When You’re Not Towing: Underbed Rails Stay Out of the Way
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.
Simple, Secure Mounting: Custom Brackets and Hardware Fit Right
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.
Built for the Demco UMS System: Works with Fifth Wheel and Gooseneck Hitches
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.
Specs
Application
- Application: Demco Underbed Mount Series (UMS) 5th-wheel and gooseneck trailer hitches
Warranty
- Warranty: 5-Year limited warranty
8551012 Demco Hijacker UMS Under Bed Rail Frame Bracket Kit
This Product Fits The Following Vehicles
- 2020 - 2027 GMC Sierra 2500 6-3/4 Foot Bed without OEM Prep Pkg
- 2020 - 2027 GMC Sierra 3500 6-3/4 Foot Bed without OEM Prep Pkg
- 2020 - 2027 Chevrolet Silverado 2500 6-3/4 Foot Bed without OEM Prep Pkg
- 2020 - 2027 Chevrolet Silverado 3500 6-3/4 Foot Bed without OEM Prep Pkg
Customer Satisfaction Score:
76% were satisfied with this product
24% of customers were not satisfied
- etrailer mistake
- Wrong item was ordered
- Package not accepted
Ratings & Reviews
4.5
13 reviews
by:
Steve
10/01/2023
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.
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.
by:
Robert
04/23/2026
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!!!??
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.
by:
Scotts
04/29/2021
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:
Matthew
07/24/2023
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:
Robert
05/21/2022
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:
Brian
10/03/2020
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.
by:
Stephen
02/11/2022
Part arrived on time complete. Item matched the description.
by:
Dilan
12/29/2024
by:
Terry
12/01/2024
by:
Catherine
09/01/2023
by:
Gary
09/01/2022
by:
Rich
03/10/2023
by:
Chris
05/10/2024
2022
GMC
Sierra 2500
13
13
true
See what our Experts say about this Demco 5th Wheel Hitch Rails
- 2022 GMC Sierra 2500 Recommended Underbed Kit to Tow 5th Wheel TrailerThe 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...
- 2021 GMC Sierra 2500 Puck System AvailabilityHey 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...
view full answer... - Underbed Mounting Kit For Reese Elite 5th Wheel Hitch That Fits My 2022 Chevrolet Silverado 3500I 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... - 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 2500The 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...
- Best Towing Option For A 2022 Keystone Montana 3121RL Pulled With A 2021 GMC Sierra 3500 6-3/4 BedThe 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... - Should I Choose Demco, Reese, or PullRite Underbed Rail System for My 2020 Chevy Silverado 2500For 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... - Is There an Underbed 5th Wheel Hitch Option for a 2020 Chevy Silverado 2500 Without PucksYes, 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... - Parts Needed To Convert A Demco Autoslide 5th Wheel Hitch To A Below-Bed MountYes, 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... - Is Demco DR37FR Under Bed Rail System Compatible Wtih B&W or Curt 5th Wheel HitchesThe 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 5TH Wheel Hitch System For a 2021 GMC Sierra 2500 Short Bed Without Factory Puck/PrepI 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... - Converting Demco Hijacker UMS Double Pivot 5th Wheel Hitch to 2020 Chevy Silverado 2500 Short BedThanks 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...
- Demco Highjacker Mounting System For a 2021 Chevrolet Silverado With 6-3/4' Bed Without OEM Puck PkgThe 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... - Demco 21K Hijacker AutoSlide 5th Wheel Hitch for 2021 GMC Sierra Short BedThe Demco Hijacker Auto Slide 5th wheel hitch is a great choice for short bed trucks. For the 2021 GMC Sierra 2500, you'll want to use the # DM8550035 which is compatible with the # DM6333 adapter that fits into the GM puck system (assuming your truck is equipped with the puck system). If your truck doesn't have the GM puck system, and you want an under-bed mount you'd use the # DM8550037 along with the Demco # DR37FR under-bed rails. If you'd like to install a 7-way connector in the...
view full answer... - Recommended Auto Slide 5th Wheel Hitch for 2020 Chevy Silverado 3500 Short BedWe have just what you're looking for. The hitch I recommend using in your 2020 Chevy Silverado 3500 is the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Underbed - 21,000 lbs # DM8550037, which provides 14" of travel to keep your 5th wheel nose from contacting the cab of the truck when making tight turns. You will also need the Demco Underbed rail kit # DR37FR, which is great because the underbed installation means it will allow you to have a clear truck bed...
view full answer... - Recommended Fixed 5th Wheel Hitch For A 2022 GMC Sierra 2500 With A Short BedThe 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... - Sliding 5th Wheel Hitch Recommendation For A 2020 GMC Sierra 2500HD AT4 Short BoxYes, 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... - Underbed Rail and Installation Kit for Demco Hijacker & 2020 GMC Sierra 2500I 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... - Parts Needed to Install the Demco Hijacker Autoslide on 2021 GMC Sierra 2500HD without OEM PucksWe've got just what you're looking for with the Underbed Rail and Installation Kit for Demco Hijacker UMS 5th Wheel and Gooseneck Trailer Hitches # DR37FR, which is the underbed mounting kit for your 2021 GMC 2500HD. This is compatible with your Demco Hijacker Autoslide 18k # DM8550022 and will allow you to mount the hitch when towing and have an obstruction free truck bed when you're not. I've linked a review and installation video of this for you to check out as well.
view full answer... - Auto Slide Hitch, Underbed Rail Kit, and Goose Neck Adapter For a 2020 Chevrolet Silverado 2500With your 2020 Chevy Silverado 2500 only having a 6-3/4 ft bed with out the OEM prep package it's recommended to use a slider to provide enough clearance between the nose of the camper and the cab of the truck. I recommend the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs Item # DM8550037. This hitch provides you with the auto slide feature which takes the hassle away from getting out of your vehicle and pulling a lever to allow the hitch...
view full answer... - Recommended 5th Wheel Trailer Hitch For A 2020 GMC Sierra 2500 Denali With 6-3/4' BedHi Kim, For a 2020 GMC Sierra 2500 I have two options depending on whether you'd prefer above or below bed rails: For above bed rails you'll want the Demco Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550034 and Demco Premier Series Above-Bed Base Rails # DM39FR. For below bed rails you'll want the Demco Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550022 and Underbed Rail and Installation Kit # DR37FR. Both hitches have an 18,000lb capacity and can automatically slide back...
view full answer... - What Sliding 5th-Wheel Hitch do You Recommend for My 2022 Chevy SIlverado 2500 without OEM Prep?On your 2022 Chevy Silverado 2500 with a 6-3/4 ft. bed without OEM prep, I recommend the Demco Hijacker # DM8550022 (18k) or # DM8550037 (21k). The great thing about the Hijacker is its autoslide function that takes away the pain and inconvenience that comes with having to manually adjust the slider on other 5th-wheel hitches. Another feature of the Hijacker is the 360 degree wrap-around jaw. This style jaw provides you with a super secure contact point for your kingpin connection. As...
view full answer... - Parts Needed For Installing Demco DM8550022 Auto Slide 5TH Wheel Hitch on 2022 Chevy Silverado 2500To 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... - Custom Fifth Wheel Rail and Bracket Kit For 2020 GMC Sierra 2500 6-3/4 Ft BedThe 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...
Do you have a question about this 5th Wheel Hitch Rail?
Info for this part was:
Expert Research:
Mike L
Edited by:
Lindsey S
Installed by:
Jeff D
Video Edited:
Dustin K
Video Edited:
Chris R
Updated by:
Wilson B
Updated by:
Noah M
Updated by:
Justice A
Written by:
Kristina F
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Steve B.
10/1/2024
Absolutely great.