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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 - Single Jaw - Chevrolet/GMC Prep Package - 18K
Demco

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

Part Number: DM79GV
In Stock
$2,010.46
Retail:$2,185.00
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5th Wheel Hitch

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This hitch slides automatically when you turn to give you 14" of clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Base secures in underbed mounts and removes for full bed access. 1-800-940-8924 to order Demco 5th wheel hitch part number DM79GV 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 - Single Jaw - Chevrolet/GMC Prep Package - 18K. 5th Wheel Hitch reviews from real customers.
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Demco 5th Wheel Hitch - DM79GV

  • 18000 lbs GTW
  • OEM - GM
  • Demco
  • Sliding Fifth Wheel
  • Premium - Single-Hook Jaw
  • 18 - 19-1/2 Inch Tall
  • Double Pivot
  • 4500 lbs Vertical Load
  • 14 Inch Fore/Aft Travel

This hitch slides automatically when you turn to give you 14" of clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Base secures in underbed mounts and removes 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
  • 2 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
  • Fast, easy installation
    • Drops into the 4 receiver pucks that are built into your factory underbed rails
  • Made in the USA


Specs:

  • Application: 2020 and newer Chevrolet and GMC trucks with factory-installed towing prep package
    • 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, Lippert Road Armor, and 5th Airborne pin boxes
  • Gross towing weight: 18,000 lbs
  • Vertical load limit: 4,500 lbs
  • Travel: 14" front to back
  • Hitch height settings: 18" and 19-1/2"
  • 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

The Autoslide hitch is specially designed to fit in the underbed rails of your Ford Super Duty factory fifth-wheel towing prep package. 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 your OEM tow package receivers, 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 puck receivers in your truck bed. Turn the handles to lock the feet into the pucks 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.



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

6402 Demco High Jacker Adapter Plates for 5th Wheel Trailer Hitch - Chevrolet/GMC OEM

Installation Details DM79GV Installation instructionsAlternate Instructions DM79GV Installation instructions

This Product Fits The Following Vehicles



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Customer Satisfaction Score:

Ratings & Reviews

4.7

675 reviews
This hitch slides automatically when you turn to give you 14" of clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Base secures in underbed mounts and removes for full bed access.

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Show More Reviews

See what our Experts say about this Demco 5th Wheel Hitch

  • Recommended Autoslide 5th Wheel Hitch for 2024 Silverado 2500 With Prep Package
    Hi Claude; the best auto slide hitch for your 2024 Chevy Silverado 2500 Duramax is the Demco Autoslide 5th Wheel Hitch w/ Slider # DM79GV. This features a single-piece jaw for 360-Degree jaw-to-king-pin contact and a secure connection along with a 3/4" thick locking bar. It also has a double-pivot cushioned hitch head. This hitch is designed to fit the prep package on your truck and has an 18k capacity. If you need a higher capacity the 21k # DM29GV is also available.
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  • Difference Between Demco Autoslide and Demco Autoslide Premier Series
    HI Darryl; the Premier Series was a name used for a while on the Autoslide and other models when Demco switched to use industry standard bed rails. If you look further down on the # DM8550034 product page you will actually see premier series on an older overhead picture of the Autoslide. At this point the only thing it might indicate is that the hitch is older if it has that label on it. If you're wanting to use the Autoslide with your 2021 Silverado 3500 with a 6-3/4' bed and the OEM...
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  • What Does Demco Hijacker Autoslide # DM29GV and # DM79GV Weigh
    Hey Walton, the Demco Hijacker Autoslide hitch part # DM29GV weighs 322 lbs. The part # DM79GV weighs 290 lbs. Are you concerned about the install and removal of these hitches since they are pretty heavy?
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  • Will I Have Turning Clearance Issues Using The Gen-Y Gooseneck Pin Box On Short Bed Silverado 2500?
    The best way to prevent any clearance issues with your 2022 KZ Durango Gold G356RLQ and your 2020 Chevrolet Silverado 2500 with 6-1/2' bed and factory puck system is by using the Demco Autoslide 5th Wheel Hitch # DM79GV. This hitch slides back and gives you up to 14" of additional clearance when performing a jackknife turn. The Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box # GY38FR measures 16.9" from front mounting holes to center of hitch ball. A regular 1621 pin box this...
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  • How To Find The Torque Specs For The Side Plates # DM49GV on Demco Autoslide 5TH Wheel Trailer Hitch
    The instructions for the Replacement Side Plates # DM49GV which fit the Demco Autoslide 5th Wheel Trailer Hitch 18K # DM79GV or 21K # DM29GV are not very helpful. I have linked them below for your verification but the 1/2" grade 5 bolts are supposed to be tightened to 75lb-ft of torque. We typically do not post torque measurements and always refer them to the instructions but as they don't exactly call out the torque spec in the instructions and make you refer to their table I felt the...
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  • Which Demco AutoSlide Works w/ the GM Factory Puck System in a 2024 Chevy Silverado 2500?
    There are two Demco Autoslide 5th wheel hitches that have the side plates that mount in the GM factory puck system. These work with the Silverado's and Sierra's made after the 2020 model year. I have listed both options below: 18,000 lbs Capacity - Demco Autoslide 5th Wheel Hitch w/ Slider item # DM79GV 21,000 lbs Capacity - Demco Autoslide 5th Wheel Hitch w/ Slider item # DM29GV The Demco Autoslide 5th Wheel Trailer Hitch w/ Slider item # DM8550034 you were looking at mounts on industry...
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  • Are There Different Mounting Brackets Available To Transfer A Demco Autoslide To A GM Puck System
    You can definitely swap out the hitch for a new one if you're wanting to go with a fixed base that would weigh less than your Demco Autoslide # DM8550034, but you could also just swap out the mounting plates to save money. If you want to just swap out the plates you'll need part # DM49GV. If you want to switch to a new hitch with a fixed base then I recommend the B&W Companion OEM 5th Wheel Hitch for Chevy/GMC Towing Prep Package # BWRVK3710. This hitch has feet to drop right into the...
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  • Do I Need a Capture Plate for a Rota Flex Pin Box?
    Yes, you do. The correct one to use with the Demco Autoslide item # DM79GV is the Demco Autoslide Capture Plates for Trailair Rota-Flex Pin Boxes item # DM6171. The Demco Autoslide 5th Wheel Hitch w/ Slider item # DM79GV you were looking at is confirmed to fit the puck system of the 2024 GMC Sierra 2500.
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  • Determining Safe 5TH Wheel Towing Capacity On a 2020 Chevrolet Silverado 2500HD High Country
    According to the information you listed your maximum tongue weight for a 5th wheel is going to be 2,775lbs which is the same amount as the gooseneck tongue weight. Do understand this can vary slightly depending on how your vehicle is loaded and any additional passengers weight. Since your curb weight is 8,283lbs and if you add the full payload that will put you at 11,058lbs. That only leaves 292lbs for any passengers and additional gear in your truck. So if you carry 600lbs of gear and...
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  • Sliding 5th Wheel Hitch Options For 2024 Chevy Silverado 2500 Short Bed w/ OEM Puck System
    Correct, there is not a sliding 5th wheel hitch for the '24 Silverado 2500 from Curt that fits directly in the puck system; I checked directly with Curt as well and they do not have a fit. There are two options that do fit the puck system and are also better hitches; one is from B&W and the other from Demco: - B&W Companion OEM 5th Wheel Hitch w/ Slider for Chevy/GMC # BWRVK3775 - Demco Autoslide 5th Wheel Hitch w/ Slider - Chevy/GMC # DM79GV Both have the capacity you need, with the...
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  • Does Demco Hijacker Autoslide Fifth Wheel Require Use of Adapter
    If you have a standard pin box you would not need to use any adapters with the Demco Autoslide Hijacker part # DM79GV. I can't tell you if you do or don't have one of the mentioned pin boxes on your fifth wheel as I don't have a way to know but if you go out and check your trailer's pin box you should be able to pretty easily tell.
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  • Best Fifth Wheel Auto Slider Hitch for 2024 GMC Sierra 2500 Short Bed OEM Pucks
    The Demco Hijacker Autoslide part # DM79GV would be a really great auto sliding fifth wheel hitch. It has more than enough capacity for the trailer you mentioned as it has a 4,500 lb pin weight capacity and an 18,000 lb towing capacity. This fits directly to the OEM pucks of your 2024 GMC Sierra 2500 so there wouldn't be any adapters required.
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  • Best Auto Sliding 5th Wheel Hitch for a 2021 GMC Sierra 2500 w/ the Factory Puck System
    The best auto sliding 5th wheel hitch for your 2021 GMC Sierra is going to be the Demco Autoslide 5th Wheel Hitch w/ Slider item # DM29GV. This hitch has a 21,000 lbs capacity and is designed specifically for GM trucks with the factory puck system. The Demco Autoslide item # DM29GV is made in the USA and has the best capability of sliding hitches. With 14" of travel from front to back you will have no problem turning and backing into spots. The auto sliding feature is the way to go and...
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  • Recommended Capture Plates For Attaching A Road Armor Pin Box To A Demco Autoslide 5th Wheel Hitch
    The Road Armor pin box is just like the Trailair Rota-Flex so you'll need the Demco Autoslide Capture Plates for Trailair Rota-Flex Pin Boxes # DM6171 in order to lock your pin box to the head Demco Autoslide 5th Wheel Hitch # DM79GV and prevent it from pivoting. These will simply swap out the factory capture plates that you currently have.
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  • Best Auto-Slide 5th Wheel Hitch For 2023 Chevy Silverado 3500 With OEM Puck System
    For your 2023 Chevy Silverado 3500 with the factory puck system, easily the best auto-slide 5th wheel hitch is the Demco Hijacker. The reason I like it so much is due to its elite jaw system and cushioned head, which give you a more comfortable, quiet ride when towing compared to other hitches. The Hijacker is available in two different towing capacities for your '23 Silverado 3500: - 18,000 lb Capacity: Demco Autoslide 5th Wheel Hitch with Slider # DM79GV - 21,000 lb Capacity: Demco...
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  • Does Demco Hijacker Autoslide Fifth Wheel Hitch for GM OEM Prep Package Need Anything Else to Use
    The Demco Autoslide 5th Wheel Hitch w/ Slider # DM79GV comes with everything needed to install in the OEM pucks of your 2020 Chevy Silverado 2500. You wouldn't need anything else to use this hitch and be ready to tow.
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  • How Much Do the Demco Autoslider Hitches for the 2024 Chevy Silverado 2500 w/ Puck System Weigh?
    I would be happy to! Both the 21K Demco Autoslide 5th Wheel Hitch w/ Slider item # DM29GV and the 18K item # DM79GV fit the 2024 Chevy Silverado 2500 with the factory puck system. They both come with attached side plates that mount directly to the in bed pucks. Their individual weights are listed below: 21K Demco Autoslide 5th Wheel Hitch w/ Slider item # DM29GV - 322 lbs 18K Demco Autoslide 5th Wheel Hitch w/ Slider item # DM79GV - 290 lbs
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  • How Heavy Is The Demco Autoslide 5th Wheel Hitch # DM79GV
    The Demco Autoslide 5th Wheel Hitch w/ Slider # DM79GV weighs approximately 300lbs. The hitch head (60lbs) does come apart though to make removing/installing your hitch a bit easier. If that's not a weight you'd like to move around a lot and you don't have a tonneau cover then I recommend using a hitch head cover # DM14844 to protect your hitch and keep it in great condition.
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  • Will The Curt CrossWing Lightweight Gooseneck-to-5th-Wheel Trailer Hitch Fit New GM Puck System?
    We have installed the Curt CrossWing Lightweight Gooseneck-to-5th-Wheel Trailer Hitch Adapter # C32DR on a 2022 GMC Sierra 2500 which has the new style GM puck system. Do understand that while we didn't notice any issues when connected to a 5th wheel at our shop there are several different size 5th wheel pin boxes which would allow it to use on one but not the other. This hitch will give you a 9" offset if you want to see how that compares with your new 5th wheels pin box. Personally...
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  • Compatible Demco Autoslide 5th Wheel Hitch For A 2022 Chevy Silverado 2500 With OEM Puck System
    Yes, the Demco Autoslide 5th Wheel Hitch w/ Slider # DM79GV is the correct fit for your 2022 Chevy Silverado 2500 with OEM puck system. The mounting feet on this hitch will drop right into your pucks for an easy peasy installation. The autoslide function will provide extra clearance to make tight turns without having to get out of your Silverado to pull a slide lever.
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  • Replacement Legs or Adapter for a Demco Autoslide Hitch to Fit the GM Factory Puck System
    To replace the legs on your Demco Sliding 5th Wheel Hitch you will want the Replacement Side Plates for Demco Autoslide 5th Wheel Trailer Hitch item # DM49GV. This fits the puck pattern on 2020 - 2023 GM Trucks. These legs work with item # DM79GV and # DM29GV Demco Hitches. If you do not have one of these models you will need to use the Demco 5th Wheel Rail Adapter item # DM6333. There are two different patterns for the Chevy puck system depending on what year your truck is. If you have...
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  • Weight And Dimensions For Demco Autoslide 18K 5th Wheel Hitch DM79GV
    Hey Greg, yes, I can definitely help with that. The head and the base of the Demco Autoslide 5th Wheel Hitch # DM79GV can be separated. The head weighs about 60 lbs by itself. The base by itself is about 185 lbs. The side plates (which can also be separated) are about 45 lbs for both. You are looking at about 290 lbs altogether. As far as dimensions, the base is approximately 35 inches long x 31 inches wide. The height can be adjusted to 15-1/4 inches, 16-1/2 inches or 18 inches. Also,...
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  • Best 5TH Wheel Trailer Hitch Receiver For a 2023 GMC Sierra 2500 Short Bed With Factory Puck System
    The Demco Autoslide 5th Wheel Hitch # DM79GV is our best 5th wheel hitch for your 2023 GMC Sierra 2500 short bed with the factory prep/puck hitch system. This hitch will drop into the 4 outer mounting points in your bed for a simple installation. As you turn it will slide the hitch back up to 14" for the clearance you need for the cab. It will fit most standard pin boxes which are 12-14" wide. If you have a cushioned or pivoting pin box you may need a set of locking plates.
    view full answer...
  • Can Demco Autoslide 5TH Wheel Hitch Be Used With Lippert Turning Point Pin Box?
    You can use the Demco Autoslide 5th Wheel Hitch # DM79GV with your Lippert Turning Point pin box as long as you lockout the pin box from turning and use the Locking Plate # DM77GV. Both the pin box and Demco can not be allowed to turn otherwise you will see your 5th wheel shift to either the left or right of your truck. And since there is no way to lockout the Demco hitch you have to lock the pin box.
    view full answer...


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Info for this part was:

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