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Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Underbed - 21,000 lbs
Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches

Part Numbers: DM8550037,DM8551006

Retail:$3,283.00
Our Price: $2,746.44
You Save: $536.56
Fifth Wheel Hitch

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Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Underbed - 21,000 lbs
part number: DM8550037

This hitch slides automatically as you drive to give you 14" of additional clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Hitch removes easily for full bed access.

Features:

  • 5th-Wheel hitch mounts in your short-bed truck bed so you can tow your 5th-wheel trailer
  • Automatic slider provides clearance required for your short-bed pickup to turn safely at slow speeds
    • No more getting into and out of the truck to operate a manual slider
    • Head slides toward the tailgate when you turn and back toward the cab when you straighten out
    • Rack-and-pinion gears create smooth, controlled, automatic motion
  • Rotating hitch head turns up to 90 degrees with your trailer
    • Rotation creates the force that propels the automatic slider
    • Built-in brackets stabilize your pin box so the king pin won't rotate in the hitch - no need for a separate capture plate for standard pin boxes
  • Rail-free design allows for full access to truck bed when hitch is removed
  • Wraparound, single-piece jaw provides a secure connection
    • 360-Degree jaw-to-king-pin contact
    • Less rattle and more security than slide-bar jaws
  • 3/4" Thick, solid steel locking bar reinforces the connection of your coupled trailer
    • Automatically locks into place when the jaw closes
  • Double-pivot hitch head eases hookup and helps to limit chucking
    • Pivots front to back and side to side
  • 3 Height settings to fit your application
  • Cushioning polyurethane dampeners help reduce noise and absorb road shock
  • Spring-loaded handle with comfort grip allows for simple coupling
    • Tethered safety pin lets you secure the handle in the open or the closed position
  • Sturdy steel construction with rust-resistant black powder coat finish
    • Diamond-plate tread on hitch base adds unique styling
  • Custom Demco underbed mounting kit required for installation
  • Made in the USA


Specs:

  • Designed for use on 6-1/2' truck beds
  • Fits standard pin boxes 12" - 14" wide
    • Locking plates (sold separately) are required for use with Glide Ride, Mor Ryde, Trailair Tri Glide, Trailair Flexair, Rota Flex, and 5th Airborne pin boxes
  • Gross towing weight: 21,000 lbs
  • Vertical load limit: 5,250 lbs
  • Travel: 14" front to back
  • Hitch height settings: 15-1/2", 16-3/4", and 18-1/4"
  • 5-Year limited warranty


Note: This fifth-wheel trailer hitch is not compatible with Sidewinder or Revolution king pins. Do not use any device that changes the pivot point of your trailer's king pin with this hitch.


Automatic Slider Makes Cornering Easy

Most often used on trucks with 6-1/2' beds, a slider helps to eliminate clearance problems during slow-speed turns. When you are towing a fifth-wheel trailer, your hitch must be situated on the cab side of your truck's rear axle. However, at slow speeds you can use a slider to slide the fifth-wheel hitch (and the trailer) toward your truck's tailgate and past the rear axle, creating enough space between the cab of your truck and the trailer to permit less-restricted turning.


Normally, you'd have to get out of your truck and pull a lever to release the slider before every turn, but what if there was an automatic system? Imagine having 14" of extra clearance while towing your fifth-wheel trailer. Now imagine having this without needing get out of the truck to move your slider. The Demco Autoslide makes this fantasy a reality. The Autoslide automatically glides back smoothly when you make a sharp turn so you can maneuver effortlessly around tight corners within campsites and parking lots.


Demco Hijacker Autoslide

The base of the Autoslide has a built-in rack-and-pinion gear system that operates automatically. As your truck turns, the pinion in the base also turns. This activates the rack gear, which causes the rotational force of the truck to be converted into the linear sliding action of the hitch. So, when your truck makes a sharp, slow-speed turn, the gears inside the Autoslide force the hitch head to slide down toward your truck's tailgate in a smooth, controlled motion. This way, any time that your truck turns more than 10 to 15 degrees, the Autoslide will ensure that there is enough clearance for your trailer to complete the turn as well, and it will do so without any jerking or binding.


In order for the rack-and-pinion assembly to function as designed, the pin box must be stabilized on the hitch head. Normally in a fifth-wheel hitch, the king pin moves inside of the hitch head so that the trailer can turn. With the Autoslide, the king pin remains fixed inside of the jaws of the hitch and it is the hitch head itself that turns. This is thanks to the capture brackets on the sides of the head that brace the pin box from both sides to hold it in place on top of the hitch head. This is done to ensure that there is enough resistance within the hitch when your truck turns to properly activate the rack-and-pinion gear mechanism.


Demco Hijacker Autoslide capture bracket

To stabilize your pin box on the hitch head, simply push the capture brackets up against your pin box once the trailer is coupled and tighten the outer bolts and the inner jam nuts. The Autoslide head and brackets will fit standard pin boxes that are between 12" and 14" wide. If you have a Glide Ride, Mor Ryde, Trailair Tri Glide, or 5th Airborne pin box, you must install a special locking plate (sold separately) as well.


When you straighten your rig out again and your trailer moves back in line, the hitch head will rotate back to center and slide back toward the cab into the straight towing position.


Secure Wraparound Jaw with Locking Bar

Demco Hijacker Autoslide wraparound jaw and locking bar

The single-piece, strong wraparound jaw completely surrounds your trailer's king pin for 360 degrees of contact. This wraparound jaw provides a more secure connection than standard 2-piece jaws that close in on the king pin from the sides. The increased jaw-to-king-pin contact on the Autoslide offers tighter tolerances around the king pin, which minimizes both rattle and chucking, for a smooth, quiet ride.


A 3/4" solid steel locking bar spans the area in front of the jaw. This bar provides an added barrier of protection against accidental disconnection so you can have peace of mind that your trailer is secure. The locking bar is attached to the jaw and to the spring-loaded handle. The bar automatically locks when the jaw closes around your king pin.


Double-Pivot, Cushioned Hitch Head

The double pivoting, cushioned head improves your towing experience dramatically by helping to reduce jarring and unwanted noise. Built-in pins allow the hitch head to pivot back and forth and side to side. And hooking up is easy because the hitch head will automatically pivot to the proper angle when it comes into contact with your pin box.


Three polyurethane dampeners help to cushion the movement from the pivoting head and to reduce towing noise. Two of these dampeners are built into the head assembly to cushion the head's side-to-side pivoting. The third dampener cushions the back-and-forth motion and must be installed in the hitch prior to use. Installation of this third dampener is easy - simply press the dampener up into the pre-drilled hole underneath the hitch head.


Easy Installation

The Autoslide hitch is specially designed to fit a Demco UMS custom underbed mounting kit . The hitch comes pre-assembled for an easy installation. All you have to do is bolt on the side plates and attach the head to the hitch base.


The side plates have 2 functions. They contain the feet that fit into the receivers in your truck bed, and they allow you to raise or lower the hitch head to better match your pin box height. After you choose your desired height setting, simply bolt the side plates to the hitch base with the included hardware. Then lower the hitch into the 4 UMS receivers in your truck bed. Turn the handles to lock the feet into the receivers and secure the handles with the included safety pins. The hitch can be removed to give you full truck bed access. Simply remove the safety pins, turn the handles to unlock the feet, and lift the hitch out of the receivers.


Clearance Formula for Short Bed Trucks

Use the formula below to ensure there will be enough space between your truck cab and trailer when executing a 90-degree turn.


(A+B) - C = Clearance


A = Distance from the center of fifth-wheel hitch jaw to truck cab

B = Length of Travel (14")

C = Width of trailer divided by 2 (to get half)


For example: If the distance from the center of the hitch to the cab is 36", 36" + 22" = 58". If your fifth-wheel trailer is 102" wide, take half (51"), then plug in: 58" - 51" = 7" of clearance.


Note: At least 4 inches of clearance is recommended to safely execute a 90-degree turn.



6107 Demco Hijacker Head Assembly for Auto Slide 5th Wheel Trailer Hitch - 21,000 lbs

6004 Demco Hijacker Adapter Plates for Underbox Mount 5th Wheel Trailer Hitch

Product Expert Kathleen M

Is this right for you? Product Expert Kathleen M says:

Yes, if you:

  • Are a full-time RVer and don't use your truck bed for much else
  • Swap trailers with your friends and like being able to hook up without the need for extra capture plates
  • Have to make tight turns often and want to save yourself the hassle of getting out every time you need the hitch to slide

No, if you:

  • Have an eye for details and would be bothered by chipped paint that could eventually lead to rust
  • Plan on traveling on rough, uneven roads - the Autoslide's been known to bind in these conditions
  • Have a lifted truck and need a hitch that sits lower in the bed


Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches
part number: DM8551006

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.

Features:

  • Installation kit is designed for use with Demco UMS 5th-wheel and gooseneck trailer 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 mount to the outside of your truck's frame rails - drilling is required
    • Crossmembers sit along top of frame rails, beneath bed
  • 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


8551006 Demco Hijacker UMS Under Bed Rail Frame Bracket Kit




Customer Satisfaction Score:


Customer Reviews

Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Underbed - 21,000 lbs - DM8550037

Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches - DM8551006

Average Customer Rating:  4.7 out of 5 stars   (582 Customer Reviews)

This hitch slides automatically as you drive to give you 14" of additional clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Hitch removes easily for full bed access. 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.

by: Richard H. 05/13/2016

This hitch has been used daily since i purchased it. I deliver fifth wheel travel trailers all over the country. This hitch has worked flawlessly from day one. This hitch is one of the only products that I've ever bought that is exactly what it was described to be. Im not one to do reviews, so the fact that im doing this one , in itself, says a lot about the quality of your product. The design and looks are much better than any other hitch ive seen. It just looks better in the truck bed than others do.



by: Brian05/28/2020

Instructions left alittle to interpretation when it came to hitch height in the bed of the truck. For a f350 super duty it is the medium set up. Save you some time and effort. Other then that it looks great and will be testing it out this weekend.



by: Charles12/26/2018

Great hitch for a short bed truck thanks etrailer



by: Jason11/09/2018

Hitch works great. Had some issues using it when I first got it with putting the pin to lock down the handle but its worked much better lately. The hitch is heavy so I leave it in the back of the truck. Wish I could remove it so it doesn't get weathered.



by: Dave 10/01/2019

great hitch for my customers new truck to pull his new Durango 5th wheel!

Fast Delivery as well

Always RV
Mesa Az



by: Devin05/09/2020

Hitch looks great and functions great as well. Installation could’ve been smoother due to the installation instruction measurements being slightly off. Look at finding hole caps that are 3” instead of two and drilling the larger hole.



by: Michael 10/21/2016

Hitch sucks pain in the assembly to connect and disconnect.



by: Kyle04/07/2019

Great functional hitch. Poor powdercoating though (mostly flaking off) with quite a bit of rust after only a year.



by: Wayne 10/01/2022



by: Jeff 03/08/2023



by: Michael 09/03/2021



by: Gary 09/01/2022



by: Todd 08/13/2021



by: James 08/12/2021



by: Vance05/09/2022

Well built fifth wheel hitch. Haven't got a chance to tow our new Montana High Country 295RL. But I know a guy that has towed his fifth wheel with this same hitch. I'm sure this 18K hitch will be excellent! Or I wouldn't have bought it. I recommend e trailer for everything.



by: John07/15/2022

Demco auto slide hitch works very well with my crew cab short bed Ram. Fits under my tonneau cover nicely. Trouble free thus far. Had to purchase a Demco plate for the camper to make the Rhino box hitch work. etrailer personnel were great in helping ensure I had the right products and kept me well informed of shipping dates.



by: Anthony 04/19/2024

LOVE, LOVE, LOVE IT. I purchased 2 different 5th Wheel Hitches before I purchased this one. After hitting the cab of the truck, I wanted to get a slider. I did my research for several months and just kept coming back to the Demco. This hitch automatically makes the adjustment when I need it, even when I don't realize I need the extra room. I never have to get out of the truck to release the hitch to slide back. I put the hitch together with no problems, of course it came about put together anyway, and the Instructions were good. the locking down ont he truck seems to be easier than other I had. The only regret I have is that I didn't buy this one sooner.



by: John T.09/20/2019

Very happy with my Demco Autoslide hitch after one year. We pull a Montana 3120 35 ft 5th wheel with a 2019 Ford F-350 short bed. Took a month long 6,000 mile trip from Colorado to New England/Canada this Summer. Lots of hilly/curvy roads and some remote campgrounds with tight corners and some near 80 degree back ins. Never came close to trailer contacting the truck. I’ve had no jerking or other issues when turning or stoping/starting. Works great. The only drawback is there isn’t much room for error when you back up to hook up the trailer, so it takes a little practice to get used to correctly lining up your Demco Hitch to the trailer. The first couple of trips, it took me 3 or 4 attempts to properly line it up. No longer an issue for me after a few trips and you get used to the angles. It weighs about 300 pounds. I got a small chain hoist which I installed in my garage rafters and easily lift the hitch in and out of my truck and just let it hang front he rafters until I need to use it.



by: Bugs07/20/2020

Item works exactly as described. I have a shortbed (6.5') Ford F350. Probably towed our 5th wheeler 5000+ miles with no problem. Then last year it happened! We were making a sharp turn in an uneven lot and POW, the 5vr hit the rear window and it exploded. After that I became gun shy about turning with the 5vr attached so I started looking at sliding hitches. A slider that you had to get out and unlatch to make work, didn't make sense to me. At what point do you get out? So, an auto slider hitch was purchased. Now when I get to a certain degree turn the auto-slide hitch moves back in its carriage and then auto-slides to the normal location once straightened out. Not gun shy anymore.

Pro:
Well packaged
Well made
Easy install
It WORKS.

Cons:
Price
Very heavy
Some clunking after it straightens out from a turn



by: Ray F09/26/2019

The Demco Auto slide takes the worry out of towing my fifth wheel trailer with a short bed F-350. I have had no problems with backing into tight camping spots. And since everything is automatic I have one less thing to worry about while traveling with a fifth wheel.
The only problem is that it is a little on the heavy side, so I just leave it in the truck when not towing. Problem solved.
I am extremely happy with the product.



by: Daniel 02/28/2024

Solid hitch and fits as expected. Only 4 stars due to the limited hitch up angles. You really have to be within about 5 degrees of straight with the hitch in order for the system to function. Did not have this much of a problem with my other auto slide hitches, but this is the only one I could find with the weight rating I needed for my combo.



by: Tommy08/25/2023

Well the Demco 5th wheel hitch is great! Great product, well built, great value! but, the delivery was terrible. I ordered the hitch on 8/10 and it didn't ship until 8/18! I was promised a delivery date of 8/17, but no one at e-trailer could find the hitch and did not get any answers from the shipping company. After many phone calls, they finally located the hitch with the shipping company, Estes, and the hitch was delivered on 8/22. I would use e-trailer again, but they need better control over the shipping.



by: Milt06/15/2022

This was the best solution for my Dodge RAM 2500 towing my Alliance 340RL 38' 5th Wheel. My son helped me install the rails under the bed and now it is very easy to remove the hitch when I am not using it. It is very strong and I highly recommend this for anyone with a short bed truck.



by: Bob T12/16/2020

This review is for the Demco Autoslide 21k and accompanying OEM rail adaptor I purchased for a 2020 Ram 3500 Megacab DRW. I've owned it one year. Overall, the hitch performs as I expected. It is high quality, very sturdy and seems like it will last for a long time. I had it installed at the dealer when I purchased the truck. It automatically slides to protect the cab in my 6'4" bed without any incidents. I tow a standard fifth wheel RV. There are a few negatives, which are not necessarily shortcoming of the product but, instead, necessary evils to allow me to have a short bed. First, it is BIG and BULKY. I believe this is just a function of the mechanism required to allow the autosliding feature and I am not really sure there are any other lighter alternatives with this feature. The fact it requires two parts (OEM Puck Rail and hitch), make it even more bulky. It takes up almost the entire bed and prevents most auxillary tank / tool box combos from fitting. Even standard size storage bins will not fit in my bed. I would prefer if they had a custom OEM all-in-one hitch for my truck like they do for the Ford. It adds significant weight, which decreases carrying capacity, which can be at a premium in hauling a heavy fifth wheel. I've never even tried to take it out of the bed due to the weight and difficulty. I also am not very happy with the adjustable catch plate design. It requires significant manipulation loosening and tightening 8 nuts when hitching and unhitching. This requires a step ladder to reach the nuts. I also found out after the fact that it does not come with the right size catch plate attachments for my hitch and I had to purchase a separate part, which added unexpected expense and delayed my taking the RV on its first trip. Overall, I am satisfied with the hitch.



by: Adam12/29/2018

My wife and I are full-time RVers, and have used this slider hitch from the get-go while traveling around seeing the country over the past year. We are happy with our purchase, which has proven to be both easy to hook up, adjust, and functions well, as advertised.

The only matter I think you may want to address are the thick plastic removable maintenance access covers which tend to bow, and the areas around the attachment holes have melted, in the hot weather. Perhaps instead using a light metal for the covers would be better solution.

We are very happy overall with this hitch, and plan to keep it . Thank you.


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Ask the Experts about this Fifth Wheel Hitch
Do you have a question about this Fifth Wheel Hitch?


  • Choosing Between the Demco Autoslide and B&W Companion for 2020 Ford F-250 without OEM Prep Package
  • I can understand why a hitch like the Demco Hijacker Autoslide # DM8550022 (18k) or # DM8550037 (21k) is so attractive; they provide a much better solution for towing a 5th wheel with a short bed truck when it comes to not having to get in and out of the truck each time you need to make a tight turn. With that said, they're not compatible with B&W Turnoverball Underbed kits like the # BWGNRK1116-5W since the hitches connect to the underbed kit in two very different ways. In order to
    view full answer...

  • Will Demco Hijacker AutoSlide Fifth Wheel Hitch Allow 2016 Ram 3500 to Make Tight Turns when Towing
  • The great thing about the Demco Hijacker Autoslide 5th Wheel Trailer Hitch # DM8550037 is that it slides automatically back 14 inches as you make tight turns. Because of that it would allow your 2016 Ram to make tight turns without interference, BUT since you have the factory rail kit you would want the # DM8550035 instead with the adapter part # DM6099. Both of these combined is 391 lbs but it is designed to be taken apart in sections to allow for an easier removal.
    view full answer...

  • Best Auto Slide Hitch For 2020 Ford F-250 Super Duty That Doesn't Require Rails in the Bed
  • I have a great option for you that doesn't require rails in the bed. I recommend the Demco 21K Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider part # DM8550037 and the under bed rails part # DM8551009 for the 2020 Ford F-250 Super Duty. The Hijacker is one of the easiest to use sliding fifth wheel hitches on the market because you don't have to get out of your truck to adjust the slider when you make turns which can become inconvenient especially in city traffic or bad weather.
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  • Best 5th Wheel Towing Setup for a 2007 GMC Sierra 2500HD
  • Since you have a short bed (6-1/2') on your 2007 GMC Sierra 2500HD, you will need a rolling hitch or more commonly referred to as a sliding 5th wheel hitch for your 397 Heartland Edge Toy Hauler to make tight turns. The general rule of thumb is that if you're towing a 5th wheel trailer with a truck that has a bed shorter than 8' then you will need a sliding hitch to gain clearance between the trailer and the cab of your vehicle while turning to prevent them from contacting one another,
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  • Underbed Mounting Kit to Use Demco Hijacker 21K on 2009 Dodge Ram 3500
  • The correct underbed rail kit for your 2009 Ram 3500 so that you can use the Demco Hijacker Autoslide # DM8550037 is the part # DM8551005. This is a custom kit for your truck which will help to reduce the aount of drilling and time needed to perform the installation, but we do still estimate a total installation time of around 4-1/2 hours. The brackets will mount to the outside of the truck's frame rails (where some drilling will be needed) and the crossmembers will sit along the top of
    view full answer...

  • Is a Sliding 5th Wheel Hitch Needed for a 2017 GMC Sierra 3500
  • The only way to be certain whether or not you have the correct fifth wheel hitch in regards to sliding vs fixed is to first measure both the truck and trailer. I understand this may be difficult if you do not physically have the trailer but is needed to ensure accuracy. There are certain truck/trailer combos that can use a fixed fifth wheel hitch and short bed and there are certain truck/trailer combos that can't use a fixed fifth wheel hitch and short bed. The general rule we use is to
    view full answer...

  • 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...

  • Will Demco Hijacker Autoslide Work With B&W Turnovernall On 2016 GMC Sierra 2500
  • The Demco Hijacker Autoslide 5th Wheel Trailer Hitch won't work with a B&W Turnovernall Gooseneck Trailer Hitch. The issue is not that they don't offer a way to attach the two but rather that the singular connection point cannot withstand the stress of an auto-sliding fifth wheel hitch. Therefore, you can either use the B&W Companion Slider Gooseneck-to-5th-Wheel Trailer Hitch Adapter part # BWRVK3400 or remove the B&W Turnovernall Gooseneck Trailer Hitch and install the Underbed Rail
    view full answer...

  • Can Demco Hijacker Autoslide 18K Be Converted To 21K?
  • The only difference between the Demco Hijacker Autoslide 18k # DM8550024 and the 21k # DM8550037 is the base assembly. Both use the same head, but the base is what gives each hitch its rating. To change the 18k to 21k you would need the 21k base and head assembly # DM6107 and the reuse the side brackets for mounting to your 5th wheel rails. The base is not available by itself.
    view full answer...

  • Side Rail Kit for 21K Demco Hijacker to Fit UMS Underbed Kit on 2020 Chevy Silverado 2500
  • Yes! To convert the 21K Demco Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550035 to the Hijacker # DM8550037 you just need the Side Plate Kit # DM6004. This is for the Demco UMS underbed system so in order to install this on your 2020 Chevy Silverado 2500 you need the Underbed Rail and Installation Kit # DR37FR. This kit is similar to an OEM puck system for any truck but Demco has their own spacing for the mounting holes so you can only use Demco 5th wheel hitches that have the
    view full answer...

  • Which 21k Demco Hijacker Fits OEM Pucks of 2020 Ford F-350
  • The Demco Hijacker part # DM8550037 that you referenced was designed to fit Demco's under bed mount system and not the Ford pucks you have in your 2020 Ford F-350. The version that fits your truck pucks is the # DM8550038. If you have the UMS version you could swap the side plates to the part # DM6033 and it would then fit your truck.
    view full answer...

  • Recommended Fifth Wheel Hitch Setup for 2017 GMC Sierra 3500 to Tow 2020 Keystone Fuzion
  • The Curt Q20 5th Wheel Hitch # C16671 that you referenced is a great option to tow your 2020 Keystone Fuzion if you decide to have your GM dealership install their factory below bed rails. We have some great aftermarket options for you that you can get from us here at etrailer.com. Aftermarket systems are typically less expensive than factory options without sacrificing safety, capacity, or features. For a complete underbed rail 5th wheel system for your 2017 GMC Sierra 3500 Denali,
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  • Can Fifth Wheel Trailer With MOR/Ryde Pin Box be Pulled Using Demco Hijacker Without Capture Plate?
  • If you are going to be using your Demco Hijacker # DM8550037 to get your fifth wheel home then you will need to first install Locking Plate # DM6025. Though I can imagine it is less than convenient for you, the locking plate is a requirement for using the Demco hitch with a MOR/ryde pin box.
    view full answer...

  • Can the Andersen Ultimate Be Used on a 2018 GMC Sierra 2500 Short Bed
  • I do have an option for you but the Andersen Ultimate Connection 5th Wheel Trailer Hitch System part # AM3200 or any of them for that matter will not work on most short bed trucks like what you have on your 2018 GMC Sierra 2500 because they do not provide enough turning clearance even with the offset adapter but if you want you can measure for this using the attached help article. Therefore, the only option you have is a sliding 5th wheel hitch or a fixed hitch with rotating pin box but
    view full answer...

  • What Type of Fifth Wheel Hitch Can Install in Gooseneck Hitch in Bed of Truck
  • The Demco Hijacker needs to attach to a standard set of fifth wheel rails. Since that's what you have then you could use a Curt Spyder adapter # 16085 and you'd be able to tow a gooseneck trailer.
    view full answer...

  • 5th Wheel Trailer Hitch and Install Kit for a 2016 Ram 3500 Short Bed and No Prep Package
  • Yes, you can install an under-bed 5th wheel installation kit. For your 2016 Ram 3500 short bed without the factory prep package I recommend Demco install kit # DM8551006. When the hitch is removed the bed will be clear for cargo. For a 5th wheel trailer hitch that fits this kit I recommend the Demco HiJacker auto-sliding 5th wheel trailer hitch # DM8550037. This hitch is rated for 21,000 pounds gross trailer weight. It slides automatically so you will not have to get in and out of the
    view full answer...

  • 5th Wheel Trailer hitch and Installation Kit for a 2016 Ford F-350 Short Bed without Prep Package
  • Since your 2016 Ford F-350 short bed does not have the factory 5th wheel prep package you will first need an installation kit. I recommend the Demco under-bed kit # DM8551000. This kit mounts under the bed like the factory prep package. When the hitch is removed you will have a clear bed for cargo. For a compatible 5th wheel trailer hitch I recommend the Demco HiJacker # DM8550037. This hitch is rated for 21,000 pounds gross trailer weight and it slides automatically. You will not have
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  • Sliding 5th Wheel Trailer Hitch and Under-Bed Install Kit for a 2016 Chevy Silverado 2500 Short Bed
  • We do have under-bed installation kits that will fit your 2016 Chevy Silverado 2500 short bed and hitches to match! For an under-bed install kit I recommend B&W kit # BWGNRK1016-5W. This kit also doubles as a gooseneck hitch should the need arise. For a hitch I recommend the B&W Companion hitch # BWRVK3400-5W. With this set up, when the hitch is removed, the bed will be clear. I have linked a video review of this hitch for you. I also recommend adding an in-bed 7-Way trailer connector,
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  • Availability of Ford Tow/Prep Package Compatible Roller/Slider for Curt A16 5th Wheel Hitch
  • The good news is that you won't need an entire new hitch. You'd just need the Ford Tow Prep Package compatible slider unit, part # C16020 which would take the place of the legs on your current hitch. The first time you use the slider unit, you might need to adjust the pins that connect with the pucks a little bit, but once adjusted and locked into place, you should need to do that again. If you don't already have a 7-way trailer connector installed in your truck bed, you can install
    view full answer...

  • Recommended Non-Vinyl Tonneau Cover for Towing 5th Wheel Trailer with 2016 Ford F-250 Short Bed
  • For your 2016 Ford F-250 and specific application I highly recommend the BAK Revolver X4s Hard Tonneau Cover # BAK77ZR. This is an excellent cover that features the durable aluminum construction of a standard hard cover but with the versatility of a soft vinyl unit with its rolling design. This will allow you to maintain a view out of the rear cab window when it's rolled up for towing as opposed to a folding model that would completely obstruct your view when folded up. The cover's
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  • Demco Fifth Wheel Bracket Kit Recommendation that Doesnt Require Frame Drilling
  • I have a no-drill Demco rail kit solution for your 2014 Ram 3500, but the # DM8551006 does require drilling of the frame. However, if you have the UMS hitch this would be your only option. The part # DM8552026 is another option for you to consider as it is a no-drill install. This will fit all fifth wheel hitches that are designed to fit industry standard rails.
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  • Availability of Valley Industries 5th Wheel Hitch Underbed Mount for 2017 Ram 3500
  • I have an under bed option for you, but since Valley Industries went out of business about 5 years ago (2012) they have not produced any underbed kits that will work with your sliding Valley Industries 5th Wheel Hitch on your 2017 Ram 3500. The only under bed rail system that is available for your 2017 Ram 3500 with a 6 foot bed is the Demco Custom Install Below Bed Rails # DM8551006. These rails are only compatible with the Demco Autosliding 5th Wheel Hitches. You can either use the
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  • Recommended Under-Bed 5th Wheel Install Kit for a 2019 Ram 3500 with RamBox
  • The only underbed fifth wheel install kit for a 2019 Ram 3500 is the Underbed Rail and Installation Kit for Demco Hijacker UMS 5th Wheel and Gooseneck Trailer Hitches part # DM8551006 which can then be used with the Hijacker UMS Double Pivot 5th Wheel Trailer Hitch part # DM8550032. The Demco Hijacker UMS is a great option which has a full wraparound style jaw that makes for an exceptional ride due to the reduced chucking and jarring. Please note, because of the RamBox feature you must
    view full answer...

  • Under Bed Auto-Sliding 5th Wheel Trailer Hitch and Install Kit for a 2018 Ram 3500 Short Bed
  • I have the perfect hitch and install kit for your 2018 Ram 3500 short bed. For the under bed installation kit use # DM8551006. Then for the auto-sliding hitch use Demco HiJacker 18K # DM8550022 or the 21K version, # DM8550037. I have linked videos on all three of these products for you. Please note: Installation kit does not fit vehicles with factory Air Suspension system I also recommend Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness # DM8555002 to add a 7-Way connector in the
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  • How to Tow 5th Wheel Trailer with 2016 Ram 3500 and Demco UMS Rails
  • Yes, you can definitely use the Underbed Rail and Installation Kit # DM8551006 on your 2016 Ram 3500 along with the UMS Series Gooseneck Trailer Hitch # DM5988 and Convert-A-Ball Adapter w/ Offset # CAB-C5GX1216. Since you have a short bed I do recommend checking out our clearance formula and checking your measurements to make sure this setup will give you clearance to make turns without hitting your truck cab: (A + B) - C = Clearance A = Distance from center of fifth wheel hitch
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  • Recommended Universal 5th Wheel Mounting Brackets for a 2016 Ram 3500
  • The Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches # DM8551006 for your 2016 Ram 3500 are designed for Demco 5th wheel hitches that use the Demco UMS (underbed mounting system) which is a unique mounting system only compatible with some of their hitches, like the 18K Hijacker # DM8550022. For universal rails that are compatible with 5th wheel hitches that use the industry standard system I recommend going with the Curt # C16430-204. This gives
    view full answer...

  • 5th Wheel Trailer Hitch to Fit with a B&W Turnoverball Gooseneck Hitch in a 2014 Ram 3500
  • The Demco Underbed Rail Kit # DM8551006 will not fit with the B&W Turnoverball, or any other gooseneck hitch, in your 2014 Ram 3500. To tow a fifth wheel trailer with the Turnoverball you can use the B&W Companion # BWRVK3400 which fits right into the gooseneck. They're specifically designed to work together. This is the sliding hitch which helps with turning clearance in a short bed truck like yours. I've linked a video of the Companion for you.
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Info for these parts were:

Employee Lindsey S
Edited by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Updated by:
Amanda M
Employee Kristina F
Updated by:
Kristina F
Employee Justice A
Updated by:
Justice A
Employee Chelsea B
Written by:
Chelsea B
Employee Chris R
Video by:
Chris R
Employee Andrew S
Test Fit:
Andrew S

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