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Backing into a tight campsite or making a sharp corner in town is a lot easier when your hitch does the work for you. With 14" of automatic slider travel, the Demco Autoslide moves the hitch head smoothly toward the tailgate whenever you turn at slow speeds, giving your trailer the clearance it needs to avoid hitting the cab. The rack-and-pinion gear system keeps that motion controlled and steady, so there’s no jerking or binding when you maneuver in close quarters.
The premium single-hook jaw completely wraps around the king pin for full 360-degree contact, giving you a tight fit that cuts down on rattle and chucking. A solid 3/4" steel locking bar reinforces that connection and automatically locks when the jaw closes, so you know your trailer is secure before you even pull away. It’s a solid, quiet setup that feels stable mile after mile.
The double-pivot head moves both side to side and front to back to handle bumps and dips without transferring harsh motion into the truck. Three polyurethane dampeners cushion those movements to reduce towing noise and road shock. As soon as the pin box meets the hitch head, it pivots to the right angle for coupling, making hook-ups simple and forgiving even on uneven ground.
The included underbed mounting kit keeps your truck bed clear when you’re not towing. The hitch base drops into four UMS receivers, locks in place with turn handles and safety pins, and lifts out just as easily when you need an open bed. With three height settings—15-1/2", 16-3/4", and 18-1/4"—you can match your trailer’s pin box height for a level towing setup.
Alternate Instructions
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello, everybody. This is Jeff at etrailer.com. Today, we're gonna take a look at this underbed rail and installation kit for the Demco Hijacker UMS 5th wheel and gooseneck trailer hitches. Now, this is a custom fit part. It is designed to fit the 2020 and newer Chevrolet Silverado and GMC Sierra 2500 and 3500 HD trucks without the OEM prep package. And on a custom fit part like this, I do like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show if this will work for your application.
Now, many trucks now are coming equipped with the factory installed underbed puck systems in the truck bed to allow you to install a 5th wheel hitch for towing and then easily remove the hitch when you're not towing. Now, if you do not have one of those already installed in your truck bed, this kit will let you have that same underbed mount system for your Demco Hijacker 5th wheel and gooseneck trailer hitches. Wanna pop up an insert. There's the Demco hitch. It'll fit right into this.
Now, the advantage with this underbed mount system is when you're not towing your 5th wheel, you can remove that hitch from your truck bed and still have full access to your truck bed. There's no rails to get in the way. This installation kit is designed for use with the Demco Hijacker underbed series 5th wheel and gooseneck trailer hitches. These underbed rails right here will provide complete access to the truck bed when the hitch is removed. The rails are not exposed.
They're all underneath the bed. And it'll just give you four small mounting holes that'll sit flush with the truck bed. As we mentioned, this is a vehicle specific design, so it does reduce the installation time and requires less drilling than universal systems. Basically, these brackets right here on the sides, these will bolt onto the outside of your truck's frame rails. These crossmembers will sit along the top of the frame rails beneath the bed.
Now, drilling is required for installation. These parts are a steel construction. They have a nice, black powder coat finish to resist corrosion. Now, this does include everything shown here. The frame mounting brackets, the crossmembers, all the installation hardware, even gives you a couple tubes of threadlockers to put on the bolts when you go to install it. And it even comes with four of these cap plugs that you'll insert into the holes in your truck bed to keep those holes protected from any dirt getting into them. Comes with a nice set of instructions that'll describe how this all goes together. But that should do it for the review on the underbed rail and installation kit for the Demco Hijacker UMS 5th wheel and gooseneck trailer hitches..
Ratings & Reviews
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
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
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
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.
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.
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!!!??
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
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.
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