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  1. 5th Wheel Hitch
  2. Demco
  3. 21000 lbs GTW
  4. OEM - GM
  5. Sliding Fifth Wheel
  6. Premium - Single-Hook Jaw
THIS ITEM IS NOT A FIT FOR
2013 Hyundai Elantra
Demco

Demco Autoslide 5th Wheel Hitch w/ Slider - Single Jaw - Chevrolet/GMC Prep Package - 21K

Part Number: DM29GV
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5th Wheel Hitch
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2013 Hyundai Elantra

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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 DM29GV 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 - 21K. 5th Wheel Hitch reviews from real customers.
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Demco 5th Wheel Hitch - DM29GV

  • 21000 lbs GTW
  • OEM - GM
  • Demco
  • Sliding Fifth Wheel
  • Premium - Single-Hook Jaw
  • 18 - 19-1/2 Inch Tall
  • Double Pivot
  • 5250 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
  • 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
  • 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, Rhino, Rota Flex, Lippert Road Armor, 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: 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 vehicle's 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.



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

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

Installation Details DM29GV Installation instructionsAlternate Instructions DM29GV Installation instructions

This Product Fits The Following Vehicles



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Customer Satisfaction Score:

Ratings & Reviews

4.7

703 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

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    Hello Rege, thanks for reaching out. It sounds like you are definitely on the right track with your thinking and with your assessment and comparisons of the products you mentioned. For the 5th wheel hitch, the Demco Auto slide # DM29GV and the B&W Companion Slider # BWRVK3775 are the best two options as far as solid, durable USA made hitches. It sounds like you will be towing fairly often, so between those two options, I recommend the Demco. The automatic slider is extremely convenient...
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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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  • Is 1/8" Of Play Normal When Installing A Demco Autoslide?
    Hi Dewayne! That is normal with any of the puck mount hitches. Whether it is a Ford, GM, or Ram truck, they all have similar puck mounts in the bed of the truck. There is a locking tab at the bottom of each pin. The locking tab is rectangular shaped and rotates 90 degrees to allow it to slide in or out of the puck mount in the truck bed. The pin handle is rotated 90 degrees and the locking tab rotates 90 degrees across the puck mount opening locking the hitch in place. There is no way...
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  • 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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  • 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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  • 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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  • Recommended Auto Sliding 5th Wheel Hitch For Chevy 3500 HD Standard Bed With OEM Puck System
    Hey Michael, thanks for reaching out, and congrats on the new truck. Looks great! For a 5th wheel hitch, I recommend the Demco Autoslide 5th Wheel Hitch w/ Slider # DM29GV. This comes with custom side plates which allow it to drop right in to the puck system on your Chevy 3500. It has the automatic slider and a 21K capacity, so it checks off both of those boxes as well. Another great thing about the Demco hitch is the Jaw. It has a 360-degree jaw, and it also has a 3/4" thick steel locking...
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  • Questions About Turning Clearance With Curt CrossWing On 2025 GMC 3500 AT4
    Hey thanks for reaching out, Craig. We do not have any information stating that the Curt Crosswing cannot be used with the Curt Helux pin box, but if Curt specifically told you not to, then I would have to take their word for it. So unless you can get them to put a different pin box on your 5th wheel, we will need to go in a different direction for the 5th wheel hitch. There are other slider hitches available, but they are going to be considerably heavier than the Crosswing. For example...
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  • Troubleshooting Demco Autosliding 5th Wheel Without Smooth Operation
    Hey George, thanks for reaching out! The Demco Autosliding Hijacker is one of my favorites when it comes to 5th wheel hitches. When did you pick it up? Have you inspected the gear system yet? There is a snippet from the instructions (see attached photo) that mentions checking on the gear system periodically so that's where I'd start off looking. Let me know what you find!
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  • Will Demco Autoslide 5th Wheel Hitch for 2026 Chevy Silverado 3500 Work With Curt Helux
    Hey Justin! It looks like you have the Curt Helux # C75MJ in the photo there. The Demco Autoslide 5th Wheel Hitch # DM29GV will work with this pin box as long as you use the Demco Autoslide Locking Plate for Lippert Helux Pin Boxes # DM53KV. What kind of 5th wheel do you have?
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  • How to Know if the PullRite SuperGlide 5th Wheel Hitch is the Right Height for Your Trailer
    Great question, Rick! The fixed 18-3/8" height of the PullRite SuperGlide # PUL83RR is really the only downside to this hitch, but you'll still be able to adjust the height of your pin box which is why this 5th wheel hitch is still compatible with a lot of towing setups out on the road. Here's how you can verify if this will work with your 5th wheel trailer: 1. Park your truck and trailer on level ground and then uncouple. 2. Measure from the ground to the bed of your truck (B). 3. Add...
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  • Recommended 5th Wheel Hitch for 2021 Chevy Silverado 2500
    Hey Blake! Do you have a short bed with the prep package? If so, the Demco Autoslide 5th Wheel Hitch # DM29GV you were looking at is a really good choice. If you do not have the prep package you need the # DM57KV with rails insead. This is a high quality hitch and the autoslide feature is great to have so you don't have to get in and out while turning. The one difficult part about installation and removal will be the weight since the hitch weighs 322 lbs. The head is 60 lbs and is removable...
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  • Why Aren't There Safety Chains Made for Demco Hijacker Autoslide Fifth Wheel Hitch
    Hey Loren, so this is a great question but the short answer is that you don't have to use safety chains with fifth wheel hitches and that's why the Demco Hijacker part # DM29GV does not have any made for it. The law about safety chains is that if there's a hitch ball you need chains which is why gooseneck setups have them and fifth wheel setups do not as they have king pins instead of hitch balls.
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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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  • Side Plates Needed To Install Demco 21K Autoslide 5th Wheel Hitch In a 2023 GMC Sierra 3500 Puck Bed
    You would either need the Demco Autoslide 5th Wheel Hitch # DM29GV which already has the Side Plates # DM49GV. Or if you already have the Demco Autoslide 5th Wheel Trailer Hitch # DM8550035 you found you would need to add the Side Plates # DM49GV. These would fit either a 2023 or 2024 GMC Sierra 3500 with the factory Puck System. The Side Plates # DM6033 you mentioned are specific to Ford's puck systems.
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  • Do I Need A Sliding Fifth Wheel Hitch For A 2024 Chevy 2500 With 6.5' Bed And OEM Puck System?
    We do recommend using a sliding fifth wheel hitch for your 2024 Chevy 2500 with the 6.5' bed. The best hitch available for that application is going to be the Demco Autoslide 5th Wheel Hitch # DM29GV, which is made to go directly into the Chevy OEM puck system. The big advantage of this hitch is the auto slide feature. This means no more getting in and out of the truck to operate a manual slider. This will be a major convenience and time saver if you will be towing full time. The hitch...
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  • Best 5TH Wheel Trailer Hitch For a 2024 GMC Sierra 2500 Short Bed With OEM Prep/Puck System
    The Demco Autoslide 5th Wheel Hitch # DM29GV is going to be the best 5th wheel hitch for your 2024 GMC Sierra 2500 short bed with the factory puck system. This receiver automatically slides back up to 14" as you turn to provide you enough clearance to make a full jackknife turn. So you will not have to get out of your cab to reposition the hitch like is needed on manual sliding 5th wheel hitches.
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  • Recommended Sliding 5th Wheel Hitch for a 2024 GMC Sierra 2500 Short Bed Puck System
    You can use a fixed hitch with the short bed on your 2024 GMC Sierra 2500 puck system, but I definitely understand where you're coming from. For a "set it and forget it" type of 5th wheel hitch I recommend the Demco Autoslide 5th Wheel Hitch w/ Slider # DM29GV. I really like this system because it installs directly into the puck system, has one of the best jaw and cushioning systems on the market, and uses an autosliding feature so you don't even have to step out of your truck to lock...
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  • Can a Fixed 5TH Wheel Hitch Be Installed On a 2024 GMC Sierra 2500 With 6-3/4' Bed Prep/Puck System?
    Typically it is recommended to use a sliding 5th wheel hitch like the B&W Companion Slider # BWRVK3775 for a 2024 GMC Sierra 2500 with the shorter 6-3/4' bed and the factory prep/puck system. Personally I prefer the Demco Autoslide 5th Wheel Hitch # DM29GV since it will automatically slide back up to 14" as you turn. This will give you the clearance needed to make full jack knife turns with most 5th wheel trailers. A fixed hitch like the B&W Companion # BWRVK3710 are only ever recommended...
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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 5th Wheel Trailer Hitch For A 2024 Chevy Silverado 2500 With OEM Prep Package
    We always recommend using a sliding hitch whenever the bed of the truck falls down to the 6' range. From there you'd just need to decide if you want a fixed slider or automatic slider, which really depends on how much you'll be needing it. With your trailer being forty feet in length you'll most likely have to pull really ride and then go into a bit sharper of a turn to maneuver around so an automatic slider like the Demco Autoslide 5th Wheel Hitch w/ Slider - Chevrolet/GMC Prep Package...
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  • Does Having a Short Bed on a 2024 Chevy Silverado 3500 Require Me to Have a Sliding 5TH Wheel Hitch?
    For most 5th wheel trailers it is going to be recommend to use a sliding 5th wheel hitch when your truck has a short bed. With your 2024 Chevrolet Silverado 3500 having a short bed using a sliding hitch like the B&W # BWRVK3775 will allow you to reposition the hitch 12" further to the rear. This will give you the clearance needed to make full jack knife turns when you need to maneuver your camper at a campground or get stuck in a narrow lot. As most trailers are 8' wide and your axle center...
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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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  • 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
    view full answer...


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