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This hitch is rated for 18,000 lbs gross towing weight and a 4,500 lbs vertical load limit, giving you the strength to handle large 5th wheel campers or toy haulers with ease. The sturdy steel construction and rust-resistant black powder coat finish mean it stays solid trip after trip. Once locked in, the wraparound single-piece jaw and 3/4" thick solid steel locking bar create a tight, secure connection that eliminates rattle so towing feels steady and controlled.
With an automatic rack-and-pinion slider built in, this hitch slides itself up to 14" toward the tailgate during tight turns—no levers or getting out of the truck. As soon as your rig angles more than about 10–15 degrees, the system glides back smoothly to clear the cab for short-bed setups. When you straighten back out, it returns to center automatically. The motion is fully controlled through the internal gear system, so you get precise clearance every time without any jerking or binding.
The double-pivot head makes connecting easier by automatically tilting into position as your pin box meets the hitch. Once on the road, three polyurethane dampeners absorb shock and noise—two cushioning side-to-side movement and one damping front-to-back motion—so towing feels smoother and quieter mile after mile. The head pivots freely but stays stable enough to keep chucking and clanking to a minimum on rough pavement or uneven approaches.
Installation is straightforward thanks to the included custom underbed mounting kit. The pre-assembled base drops into four receivers in the bed and locks in place with turn handles and safety pins—no extra rail clutter left behind. When you need your full bed clear, pull the pins, twist the handles to unlock, and lift the hitch out. The design keeps things simple and manageable while giving you full bed use whenever you’re not towing.
Alternate Instructions
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer.com, and today, we're gonna take a look at this Underbed Rail and Installation Kit for the Demco UMS 5th Wheel and Gooseneck Trailer Hitches. Now, this is a custom fit kit that is designed to fit various years and versions of the GMC Sierra and Chevrolet Silverado. To confirm that this is going to work for you, please take advantage of our vehicle fit guide here at etrailer.com, input the year, make, and model of your truck, and our fit guide will let you know if this kit will work for you or if we have something comparable that will work for you. Taking an overhead look here, this installation kit is designed for use with the Demco UMS 5th Wheel and Gooseneck Trailer Hitches. These underbed rails are not exposed in your truck bed, so it allows for complete access to your truck bed when your hitch is removed. These four mounting holes, two on each rail, will sit flush with your truck bed, and they include these plastic cap plugs that are going to go into the holes in your truck bed to prevent dirt and grime from getting into them.
The brackets are vehicle-specific design, which reduces installation time and requires less drilling than your universal systems, and these brackets will mount to the outside of your truck's frame rails, drilling is required, and the crossmembers of these rails will sit along the top of the frame rails beneath the your truck bed and attached to these brackets. Now, all of these parts are made here in the USA of a sturdy steel construction with a black powder coat finish to help resist corrosion. And this kit includes everything that you see here on the table before me, you're gonna get the two rails, the mounting brackets and all of the installation hardware and the plugs, and a great set of instructions to walk you through the installation process. Well, that's gonna conclude our brief look today, I do hope that it was helpful for you. Again, my name is Andy, thank you for joining me.
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Ratings & Reviews
Love it. I like that it comes out and you get your bed back. If I had one thing to say bad on it is that when you back up to it you have to be lined up straight with it. You can't come in on an angle. But it's not the end of the world. It's great you don't have to get out in the rain to slide it back for the sharp turns.
Nice product. Pretty much idiot proof once you get it set up. After that just hook up and go. No worries about crushing your cab when running a short bed. Built well. Heavy duty. Only complaint would be the weight manually getting it in and out.
Unit is built heavy duty. Installation was pretty straight forward. Towed fifth wheel from West Virginia to Pennsylvania with no issues.
Arrived quickly. Heavy duty hitch. Folks at E-trailer kept me updated and were polite and professional when I spoke with them on the phone. Installing myself so going slow but I have the time.
When you use google chrome it does not move you to the next page to custom fit.
So it just tells you your truck shows you the product and I order 6k worth of items without putting in the custom specs that you don't know to hit. Somehow with the info I put in my two other products work but this one doesn't and I have to pay for shipping to this to fix it. Wish if you ordered 6k worth of Items they would be a little more understanding that their site does not walk you what needs to be done and help you fix the problem without charging you more. Prep and Puck systems are two different things now I know.
2003 Chevrolet Silverado 2500HD 4x4 extended bed Duramax
2003 Chevrolet Silverado 2500HD 4x4 extended bed Duramax
Hitch works perfectly. The auto slide is awesome! Very well built. Very heavy. Not something you want to be taking in and out of your bed all the time. My only complaint is that you have to be pretty straight when you hook or unhook the camper.
Seems to be very well made and high quality. Definitely takes two to lift up and into position. Minimal work required to get this slider running as it’s nearly all preassembled from the factory. Just needs the locking pin rails installed. I installed mine on the medium height setting and it has worked out very well so far with my 2020 F-250 shortbed.
The star rating is a 5, Review for etrailer is the date promised on delivery was right on, delivered direct to installer and the Product Demco slide hitch is all that Demco claims it does.
Smooth operation and being a auto slider you just hook up and don’t have to worry about sending the trailer through the cab of your short bed truck because you forgot to unlock your slider. It’s pretty awesome.
Very good fifth wheel. No problems works good. have used it alot since installed cannot hook up to trail air with out plate being installed on trailer hitch
The Demco Autoslide is the only way to go for a 5th wheel hitch for a short bed truck. The extra 14" of travel is great. Left me truck almost 90 degrees. It was even easy to install by yourself with a lot help from another person.
So pleased with this hitch! Works great on my 2015 F250 short bed. Works well with my retractable tonneau cover, fits under perfectly on the low adjustment points. If you have a short bed this hitch is the one to have.
etrailer customer service was awesome as usual!
The instructions provided with the hitch were very detailed and provided enough information for me to install it myself. I love having the mounting rails below the bed. the auto slide worked flawlessly. For the winter I left the hitch coupled with the trailer to keep my bed clear.
Hello,
This hitch has been awesome. It works perfectly all the time. My only gripe would be that the head doesn’t fall down automatically. I have to get out of the truck to tilt it down when connecting to my trailer. Other than that, I’m very satisfied with the design and operation of the hitch.
Thank You
Really like our Demco hitch, had some issues with chunking when turning, took to Demco in Iowa when passing through and they completely refurbished and readjusted to bring up to their new specs. Would deffenately buy another Demco Autoslider!
Love this hitch! Works great in 2019 F250 CC w/short bed, I can turn 90 degrees and still miss cab of truck. No problems latching and unlatching as long as everything is fairly level. I installed hitch with under bed kit by myself, wasn't too bad. I've had hitch for a year now with no problems. I would recommend Demco Hijacker Autoslide hitch.
INVOLVED INSTALLATION BUT VERY STURDY. COMES OUT EASY BUT A LITTLE
DIFFICULT TO DROP INTO THE RECEIVER HOLES IN EXTREME TEMPERATURES
DUE TO DIFFERENTIAL METAL EXPANSION IN MY AREA , NORTHERN NH
Thomas S.
2/7/2019
THE BEST FUNCTIONAL SHORT BED 5th WHEEL HITCH OUT THERE BUT ALSO THE HEAVIEST AND THE MOST DIFFICULT TO REMOVE AND REINSTALL. I HAD TO TAKE IT TO A GARAGE TO REMOVE IT AND AGAIN TO REINSTALL IT. I JUST LEAVE IT IN THE TRUCK BED NOW RATHER THAN FIGHT WITH IT.
Overall I love the auto slider mount and it works as advertised. Easy to hook up and unhook. Just have to make sure your truck is in a straight line with the RV when unhooking because you don’t want to leave this thing turned or it can be very hard to hook back up. I learned this the hard way. Turning it by hand does not work either.
The plastic inserts to cover the holes when the mount is removed don’t work because the holes are too shallow on my F250,, but that makes no difference to me because the mount is way to heavy to remove anyway. The only thing that does bother me is the rust. I have used a wire brush and rustoleum paint on several spots now. Perhaps better rust proofing would be something the company could look into for future mounts. I mounted mine in a 2017 F250 with the 6.5’ bed and added a toolbox in front of it. Had to go with the in-bed box because my rv would have hit one of the boxes that sits on top of the bed. When backing up and turning my RV (Grand Design Reflection 307MKS) misses the cab by a good 3 inches. Installation of the mount rails that go under the bed was time consuming, not much room to use a wrench under there so each bolt took a while to tighten into place. The slider is big and heavy so it was a chore getting it dropped into the holes, I got 3 big guys to help out with that part. If I had to do it again I would not have done this install myself, I would have found a shop to do it prior to buying the RV. But I already bought the RV and could not wait for a shop to get it done.
this hitch works as advertised.was a great suggestion. very heavy duty and well constructed! never have to leave the cab to release the slide just drive! custom fit under bed rails worked perfect on my 2016 f 250.no drilling frame rails. installed it myself. i am a.s.e. master auto / truck mechanic.every one at e trailer was very help full when i called with questions.they did as they said they would.was so pleased with every thing.i purchased a hitch for the front of the same truck.it to works as as it should also. thanks!
Buddy
Buddy R.
3/24/2019
good happy with the whole set up.had a small issue that demco remedied swiftly.only other thing is the finish does not seam to last.it is covered when not in use and it chips and rust,s easily
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.
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Andy
3/15/2022
The Demco hijacker 18 K I think is the best hedge out there by far three different height settings and the auto slider part of it is awesome haven’t had an issue at all