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This hitch takes the stress out of tight turns. Its automatic slider gives 14" of fore/aft travel, gliding smoothly on a rack-and-pinion gear system whenever you turn more than 10 to 15 degrees. No need to jump out and move a lever before backing into a campsite or parking lot. The head slides toward the tailgate when turning and back toward the cab when straightening, giving you the clearance you need while keeping motion controlled and quiet.
Built for serious towing, this hitch handles up to 18,000 lbs gross towing weight and 4,500 lbs vertical load. The single-piece wraparound jaw completely surrounds the king pin for 360-degree contact, while a 3/4" thick steel locking bar reinforces the connection. That tight fit cuts down on rattle and chucking, giving you a secure link that feels steady mile after mile.
The double-pivot head flexes front-to-back and side-to-side to match your trailer’s movement, making hookups smoother even on uneven ground. Three polyurethane dampeners absorb road shock and help quiet things down while you’re on the move. It’s a simple design that results in less jarring through the truck and trailer so long drives feel more controlled.
Getting this hitch ready to tow is straightforward. The included rail adapter drops right into the factory puck receivers and pins in place for a stable base. Once it’s in, you can bolt on the side plates and set one of three hitch height options—16-1/2", 17-3/4", or 19-1/4"—to get your trailer level and maintain bed rail clearance. When not in use, loosening the outrigger bar assembly keeps the hitch snug so it doesn’t move or slide around during storage.
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.
Alternate Instructions
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
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.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews
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.
I love the adapter. Received it really fast, and it dropped in and fit really well. I have a 2020 Chevrolet Silverado 3500hd, with fifth wheel prep package. I also have a Curt E16, with A16 slider to use on it.
Excellent service, was able to ship my item to me in 3 days!!! Will always refer friends and family to etrailer! The Demco 6333 fit my 2020 Denali dually perfect so I could keep my 5th wheel hitch...
Excellent product, I bought a 2020 GMC diesel the rail adapter fit perfect. As you can see in the picture, a husky fifth wheel hitch fit this adapter. The instructions that come with the adapter made it easy to install.
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.
Just had to make a small adjustment to fit the puck system but in the end, fit perfectly and seems fairly tight. My Reese slider hitch fit perfectly.
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.
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.
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.
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.
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 .
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.
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.
Overall, great products. The capture plate needs to be tweaked every time I use it and it’s finicky to get it just right but works well when it’s set. It requires a powerful impact wrench to do it. If it was easier to adjust I’d give it 5 stars. The hitch works beautifully with my short bed truck.
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.
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.
Installed in my 2014 Silverado. This looks to be a very heavy-duty hitch that doesn't require a capture plate.
Mike G.
9/15/2019
This hitch has worked well for me. It is now used in a 2018 GMC Sierra 2500. It is just tall enough that I can see it in my rearview mirror to make it easy to get lined up with the kingpin
Very easy install and super fast delivery. Unit is heavy duty without being too unmanageable to handle. Very well made. Going to feel very secure going down the road.
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 .
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!!
Hitch is amazing. I was worried about towing a 5th wheel with a short bed. Hitch works as advertised. Easy install. Thanks for the help and fast shipping.
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.
Took me less than two hours to install by myself (heavy)....and it dawned on me which sets of bolts needed to be loosened up to allow the device to seat EASILY into the pucs. Fits my 5th wheel setup perfectly!
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.
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John
7/17/2023
Still working great!