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  1. 5th Wheel Hitch
  2. Demco
  3. 18000 lbs GTW
  4. OEM - GM
  5. Sliding Fifth Wheel
  6. Premium - Single-Hook Jaw
Demco Autoslide 5th Wheel Hitch w/ Slider for Chevy/GMC OEM Prep Package - Single Jaw - 18K
Demco

Demco Autoslide 5th Wheel Hitch w/ Slider for Chevy/GMC OEM Prep Package - Single Jaw - 18K

Part Number: DM59SV
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$2,068.20
5th Wheel Hitch
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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. Pivoting head allows easy hook up and helps to limit chucking. 1-800-940-8924 to order Demco 5th wheel hitch part number DM59SV or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Autoslide 5th Wheel Hitch w/ Slider for Chevy/GMC OEM Prep Package - Single Jaw - 18K. 5th Wheel Hitch reviews from real customers.
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Demco 5th Wheel Hitch - DM59SV

  • 18000 lbs GTW
  • OEM - GM
  • Demco
  • Sliding Fifth Wheel
  • Premium - Single-Hook Jaw
  • Double Pivot
  • 4500 lbs Vertical Load
  • 16-1/2 - 19-1/4 Inch Tall
  • 14 Inch Fore/Aft Travel

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. Pivoting head allows easy hook up and helps to limit chucking.


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, non-cushioned pin boxes
  • 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
  • Simple installation with included rail adapter
    • Drop base into the puck receivers in your factory-installed prep package and easily pin hitch to rails
  • 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 the following cushioned pin boxes: Glide Ride, Mor Ryde, Trailair Tri Glide, Trailair Flexair, Rota Flex, Lippert Road Armor, and 5th Airborne
  • Gross towing weight: 18,000 lbs
  • Vertical load limit: 4,500 lbs
  • Travel: 14" front to back
  • Hitch height settings: 16-1/2", 17-3/4", and 19-1/4"
  • 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, Rota Flex, Lippert Road Armor, 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

Included with the Autoslide hitch is a rail adapter that's specific to the Chevy/GMC factory prep package. Just drop the adapter into the puck receivers built into your truck bed and lock them in place. Then you can position the pre-assembled hitch base in your bed and easily pin it to the rails. Just bolt on the side plates and attach the head to the hitch base, and you'll be ready to tow.


The side plates have 2 functions. They contain the feet that fit into the rails, 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 attach the base to the rails with the included safety pins.


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.



8550034 Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs

6003 Demco Ultra Adapter Plates for Hijacker Auto Slide 5th Wheel Trailer Hitch

6077 Demco Hijacker Head Assembly for Auto Slide 5th Wheel Trailer Hitch - 18,000 lbs

6333 Demco Chevy or GMC Truck OEM Adapter for Attaching Standard Fifth-Wheel Trailer Hitches

Installation Details DM59SV Installation instructionsAlternate Instructions DM59SV Installation instructions



Video of Demco Autoslide 5th Wheel Hitch w/ Slider for Chevy/GMC OEM Prep Package - Single Jaw - 18K

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package Review

Hey, guys. This is Jake here with etrailer. Today we're gonna be taking a look at the Demco OEM GM Puck System Rails. These are gonna drop directly into the factory puck system on your GM truck. So, that's Chevy or GMC. And it's going to have two different rail options.

The only one that you're missing is the widest rail option. So, most of them are going to fit in the two center ones. There are some wider kits that have higher capacities that'll fit in these outer ones. This rail kit is gonna have a capacity of 25,000 pounds. Has a nice, thick black powder coat finish, that's gonna help resist rust and corrosion.

Demco does a really good job with their paint jobs. It's textured, so things are gonna be more likely to slide off of it, than to grab onto that paint and cause any scratches or chipping. One of the nicest thing about this kit is that it's gonna drop directly into your puck system. You can lock it in by pulling these levers. Something I like about these is that the levers actually have a direction that they're supposed to go in, and then you can put the pin in to lock them in place.

I will say, if you have trouble getting these latches to match up to the pucks in the floor of your the bed of your truck, what we did was we just loosened these four bolts on each of these brackets, and then it was able to move just the slightest bit to get them dropped down in place, and then we torque them down again. So, once you get it set, it's great. I like it because you don't have to make the initial investment of getting a new fifth wheel hitch just to match it to your truck bed. If you like to get trucks every couple of years, a lot of people don't like to put a lot of miles on their truck. They'll get a new one.

If you get the same truck, you can take this set of rails, put it in the new truck bed, and it match up great. If you decide to go with a different brand, you just have to get a new rail kit. You don't have to get a whole new fifth wheel hitch. Well, guys, hopefully this video helped you decide whether or not the Demco OEM Puck System Rails is gonna be right for you and your vehicle.


by:

The new lower base for the Demco hitch arrived on Tuesday via Freight it was a great interaction the driver I actually knew from a previous delivery, me and a friend were able to lift the old one out of the bed of my truck and install the new one today and all I have to say is...

PERFECT FIT!

It appears that Demco has already redesigned the lower base compared to my original one to prevent this problem from happening again. I was actually kind of shocked to see that upgrade and change.


I cannot say enough good words about you with etrailer and Demco working with me to get this problem solvedm Yes it took a little bit of work, ultimately this time we got it. I cannot thank you guys enough.

My friend and I will be finalizing the installation and getting it locked down to the bed with a few custom spacers for the lower rails this weekend.

Here are a few pictures of the installation resuming. If I remember , when I finally pick up my new camper, I'll send some pictures along too. Have to give credit where credit is due . Not sure of you have a customer wall at HQ. I know we had one in my old shop.

Anyway.. thank you again .



by:

Has to do a little assembly, really easy. Tows super nice, when turning does move towards the back. You’ll need to adjust the guides for the fifth wheel.



by:

Package arrived mangled, barely able to get it out of the delivery truck without it falling out of the packaging. In the end, no harm done, contents were not damaged.

Bought for use on a 2024 Chevy 2500 HD with factory installed pucks. Mounted a PullRite model #2700 slider fifth wheel hitch on top of the adapter. Adapter is very heavy duty and well designed. Per the instructions I loosened all of the latch bolts prior to installation into the truck. Retorqed once everything was in place. Simple, took less than 30 minutes. Then reinstalled my PullRite hitch without any issues.

Adapter seems well made and rock solid. Will have to wait until I tow again to see how everything rides. The height of the installment measures roughly 1.5-2 inches higher than before.

Ordering was a breeze, arrived in less than 3 days. Mike was very helpful throughout the process.



by:

Installation was straight forward operates very smooth and quiet installed overhead winch as seen in photo to make install easy also to remove very impressed with the craftsmanship of hitch.



by:

Very well built. This holds my Husky slider hitch perfectly. The slider operates as designed.

Unlike some other brands of adaptors on the market.

Still adds about 2"more to the installed height of my hitch compared to old style standard bed rails.



by:

Built just like the rails I had in my old truck. I actually had the Curt adapter plate before this one and had to return it because it added too much height to my hitch. This one saved me a half inch and hopefully the $[XX] bed cover I purchased will work now.



by:

Does NOT fit my Hijacker "Ultra Slide" as recommended by the professional chat [at] etrailer.com. The slots and holes do not line up and are to narrow. Will be returning.



by:

I'm so glad we found your product, which works well for our 5th wheel hitch. Saved us from having to buy a new hitch.



by:

To be honest, I wish I had gotten an 8' bed on my new truck so I wouldn't need to get a sliding hitch. It's very heavy! You have to have an engine lift to put it in and that's not very easy to do either. The arm isn't long enough so you will have to move the hitch around by hand after you hoist it up into the bed. Very heavy! But, if you have a short bed truck it's the only hitch to get to protect your cab.



by:

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:

This product was poorly shipped. The corners weren’t protected should put in hard pieces of cardboard elbows on the corners. I will show you pictures. THIS IS NOT NOW A PROTECTED ITEM FROM RUST. I WAS GOING TO CONTACT YOU TO SEE HOW TO FIX THIS. I will be waiting for a call



by:



This adapter allowed me to use the
Curt A16 hitch I already owned. This DEMCO 6333 adapter is an absolute monster. Incredibly well built with precise machining. The hitch fits very well.
Since each truck is built within a certain tolerance and slightly different I had to make a minor adjustment to the lock down positions to get the perfect fit. By loosening all 4 bolts on each of the lock down handles I was able to get the adapter to drop right in place.
Comparing this adapter to others is no comparison.
This DEMCO 6333 is much sturdier.
I added a picture of the Curt A16 mounted on the DEMCO 6333 under the LUND Tri-fold cover. Overall, this is a great combination.
I wanted to be sure to say "THANKS" to Montrell (etrailer Rep) who ensured the DEMCO was a proper fir for my truck as well as processing the order quickly. Job Well Done!!



by:

This is the 3 rd 5th wheel hitch I’ve ordered from you over 8 year period air bags shocks alway top quality and service is second to non!



by:

Quick delivery, I've always had good luck over the years with etrailer and I would recommend them to anyone!! the Box was severely damaged but merchandise in good condition. I blame UPS as for the package was extremely heavy..



by:

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.



by:

I have owned this unit for over a year now. Here are the pro's and cons that I have experienced.
Pro- I have pulled with this hitch in some really tight spaces in forward and reverse and still have the rear window in tact.
Con- Heavy, really heavy.
Pro- heavy duty,smooth riding, and double jaw lock makes a great connection.
Con- manufacturer recommends 1/8 of separation between the slides on the top of hitch. When backing upon 40' wheeler in some tight spaces it is hard to align without opening the slides a bit more. This is not he issue. Remembering to tighten them in the rush of leaving is the hard part.
Pro- once you are attached to your truck there is nothing more you need to worry about until you disconnect.
Con- If you are a weekender like me and use your truck for work the rest of the week, you will need at least one person to help lift in or out pre or post travel. Works pretty well with gantry crane.



by:

Installed in my 2014 Silverado. This looks to be a very heavy-duty hitch that doesn't require a capture plate.



by:

This is an excellent product to use for the Demco auto slider 5th wheel. Follow the directions and it will drop right into the pucks. It's heavy so it will take another pair of hands unless you're Arnold. I'm alone, so I have a 2 ton engine hoist that works real well. My auto slider drops right into adapter rails. An excellent piece of equipment from etrailer. Best place to buy rv equipment. When needed, they're an excellent choice for advice. I might add that this adapter is only for the 2020 Silverado and GMC Sierra. They have different ones for Ford and Ram. I would definitely buy from etrailer again.



by:

wow what a great hitch . Got the no drill bed rails and the bolted rite up to my B&W gooseneck hitch . Ashley E did a great job answering all my questions . Only took a few days to get here too. Took me about 2 hours to install everything and if you have a short bed truck this is the only way to go .



by:

I love this hitch. Never having used an automatic slider and moving from a long bed to a short bed truck it took me a few attempts to get accustomed to backing up.
I would recommend this slider over any other brand. No capture plate needed either.



by:

Excellent choice for a short bed Super Duty . Have towed several thousand miles with no issues. This is a heavy hitch , but that is what you get with a heavy duty Demco hitch . Plenty of room between trailer and truck when doing tight turns.



by:

Outstanding product. But even more outstanding was Customer Service and expert technical advice. All questions to the technical experts were processed fast and right on with correct answers. Customer service was unbelievable. I called them with a concern on shipment that was being held up. They got right in it and before the evening was gone my shipment was. Processed and at my house in three days. I was in a bind to move my fifth wheel and without a working hitch in my new truck. They came through with the product and shipment so I could move my camper and not have any issues.
As others have said, etrailer is above others on customer service and reliability of product and great technical help. My choice of business when I need something or have to have the correct technical data.
Thanks for the extra effort.



by:

Very fast delivery



by:

Tows great. I’m a first time fifth wheel owner. This made it easy. Be careful because this hitch is capable of angle that your trailer axles aren’t especially on a hard surface like asphalt or concrete. Over all very pleased. Be prepared to hoist this hitch in and out of your truck if you plan on removing it often. Probably weights closed to 400-500 lbs.



by:

I got a new 2021 GMC with the puck system and I wanted to be able to use my existing Pullrite Superglide 2700 hitch. I looked at the Pullrite adapter...that's a multi-piece rail system and was thinking more likely to rattle. Found this Demco adapter which is one piece and a better price.

Just put the adapter (and the hitch) in the truck this morning. Following the instructions, loosened the bolts and it dropped right in. The only thing that would've made this better is if the temp was above freezing.


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Info for this part was:

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