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  1. Fifth Wheel Installation Kit
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THIS ITEM IS NOT A FIT FOR
2006 Chevrolet Silverado

Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches

Item # DM8551010
Retail:$698.99
Our Price: $495.79
You Save: $203.20
Fifth Wheel Installation Kit
Not Confirmed to Fit

2006 Chevrolet Silverado

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Shipping Weight: 76 lbs
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Custom, underbed rail kit allows for uninhibited use of your truck bed once your hitch is removed. Works with Underbed Mount Series (UMS) fifth-wheel and gooseneck hitches. No-drill frame brackets offer a simple installation. 1-800-940-8924 to order Demco fifth wheel installation kit part number DM8551010 or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches. Fifth Wheel Installation Kit reviews from real customers.
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  • Reviews (14)
  • Q & A (0)
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Chevrolet Silverado - Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches

  • Below the Bed
  • Demco
  • Custom

Custom, underbed rail kit allows for uninhibited use of your truck bed once your hitch is removed. Works with Underbed Mount Series (UMS) fifth-wheel and gooseneck hitches. No-drill frame brackets offer a simple installation.


Features:

  • Installation kit is designed for use with Demco UMS 5th-wheel and gooseneck trailer hitches
  • Underbed rails allow for complete access to truck bed when hitch is removed
    • No exposed rails
    • 4 Mounting holes sit flush with truck bed
  • Vehicle-specific design reduces installation time and requires less drilling than universal systems
    • No-drill brackets bolt onto the outside of your truck's frame rails
    • Crossmembers sit along top of frame rails, beneath bed
  • Sturdy, black powder coated steel resists corrosion
  • Rails and installation hardware included
  • Made in the USA


Specs:

  • Application: Demco Underbed Mount Series (UMS) 5th-wheel and gooseneck trailer hitches
  • 5-Year limited warranty


8551010 Demco Hijacker UMS Under Bed Rail Frame Bracket Kit

Replaces Demco DM8551002 and DM8551003

Installation Details DM8551010 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches - DM8551010

Average Customer Rating:  3.9 out of 5 stars   (14 Customer Reviews)

Custom, underbed rail kit allows for uninhibited use of your truck bed once your hitch is removed. Works with Underbed Mount Series (UMS) fifth-wheel and gooseneck hitches. No-drill frame brackets offer a simple installation.

by:

This product is nice but doesn’t line up with OEM placement of pucks.

Etrailer Expert

Sierra K.

8/23/2021

That is because this product only fits vehicles without The OEM Prep Package. You want something like this: Item # DM6194.



by:

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.



by:

Kit made for my rig and fit as described. Installation a little on the difficult side for your typical DIY'er.

Kirk C.

7/26/2020

The under bed kit is the best. Having the truck bed useful when not traveling is great. I use a small electric hoist and casters for lifting and moving so the weigh is no problem. Installation was a little on the difficult side but any experienced DIYer can handle it.



by:

Merchandise arrived in good condition. Nothing missing. The shipping carton was in terrible condition. It was torn open from shipping, however nothing was missing or damaged . The product will fill my needs to replace the above bed rails that don't leave a clean bed when fifth wheel is removed. This will fill the bill. Thanks to Etrailer this will work perfectly for my Demco hijacker fifth wheel. Shipment was quick delivery.



by:
2017 GMC Sierra 2500

First package was destroyed in shipping, all hardware was missing, called etrailer forgot her name ( sorry ) very polite. she ordered all the correct hardware needed and had it shipped out. Except for the shipping was very pleased with etrailer.



by:
2018 Chevrolet Silverado 3500

Once I mounted everything and figured out I had to switch passenger and drivers brackets everything was fine it worked out ok



by:

It arrived in two days. Great delivery.



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2012 ChevroletSilverado



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14
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See what our Experts say about this Demco Fifth Wheel Installation Kit

  • Is Demco Hijacker Autoslide Hitch Solid Hitch for 2015 Chevy Silverado 2500HD Short Bed
    The Demco Hijacker Autoslide part # DM8550034 is a really great, solid hitch that makes towing a fifth wheel trailer with a short bed truck much easier since you don't have to get out and operate the slider mechanism. To install it in your 2015 Chevy Silverado 2500 short bed would only require you to install the Demco rail kit part # DM8551010 and you'd be set.
    view full answer...
  • Recommended 5th Wheel Hitch for 2019 Chevy 2500HD Short Bed without OEM Pucks
    I recommend using the Demco Hijacker Autoslide # DM8550034 on your 2019 Chevy 2500 without the OEM prep package since the slider automatically activates, so there's no getting out of the vehicle required each time you may need to make a tight turn. I also really like that this gives you an under-bed mounting kit with the # DM8551010 so you'll still have a completely clear truck bed when you're not towing your 5th wheel. This hitch has an 18,000-lbs capacity but if you're in need of a larger...
    view full answer...
  • Can the Demco Hijacker 5th Wheel Hitch Be Used W/ a 2014 Chevrolet Silverado 2500 W/ OEM Pucks
    Hey Nick, so it looks like the only way you're going to be able to use your Demco Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550037 with your 2014 Chevy Silverado is by using the custom underbed mounting kit # DM8551010. This is one of the few hitches that does not use ISR or an OEM puck system to install so you'd have to use their install kit.
    view full answer...
  • Recommended Auto Sliding 5th Wheel Hitch for 2019 Chevy Silverado 2500 Short Bed
    The hitch you need will depend on whether your truck is equipped with the factory tow/prep package with the pucks sunk into the truck bed and the weight capacity you're looking for. For a truck equipped with the tow prep package, for a 18K rated hitch go with The Demco Hijacker Autoslide # DM8550034 and the # DM6194 install adapter. For a 21K capacity, use the # DM8550035 hitch along with the same # DM6194 adapter. If your truck doesn't have the pucks in the truck bed, use the # DM8550022...
    view full answer...
  • Underbed Demco Hijacker Hitch and Rail Kit Recommendation for 2016 GMC Sierra 3500
    There is a great underbed rail system that Demco offers for their Demco Hijacker Autoslide hitches. The rail system you'd need for your 2016 GMC Sierra without the factory rail kit is the part # DM8551010. Then for a hitch you'd need the part # DM8550022 for the 18k version or the part # DM8550037. The Trailair pin boxes can be used with the Demco Hijacker but not the RotaFlex. To use one with a Mor/Ryde pin box requires the locking plate part # DM6025.
    view full answer...
  • Recommended Sliding 5th Wheel Hitch for a 2015 Chevrolet Silverado 2500HD Short Bed
    I have two great options for your 2015 Chevrolet Silverado 2500HD; one that is easy to use as it operates automatically, the Demco Hijacker Autoslide 5th Wheel Trailer Hitch part # DM8550022 with the Underbed Rail and Installation Kit part # DM8551010 or one that is easier to remove, the Curt A16 5th Wheel Trailer Hitch part # C16521 with the Curt Custom Fifth Wheel Installation Kit part # C16411-204. The Demco Hijacker is great because you don't have to get in and out of the truck to...
    view full answer...
  • Recommended 5th Wheel Hitch And Underbed Rail Kit Compatible With Revolution On 2012 GMC Sierra 2500
    There is only one underbed rail and hitch system we carry that is compatible with your 2012 GMC Sierra 2500 and a Revolution pin box. My recommendation is the Demco Hijacker UMS Double Pivot 5th Wheel Trailer Hitch - Single Jaw - Underbed - 21,000 lbs, # DM8550032 and the Underbed Rail and Installation Kit for Demco Hijacker UMS 5th Wheel and Gooseneck Trailer Hitches, # DM8551010. This system will give you a rail free design that will allow full access to your truck bed then hitch is...
    view full answer...
  • Installation of UMS Demco 18K Auto Slide Base Rails on a 2015 GMC 2500 Sierra Diesel Crew Cab
    I took a look at the directions and they are straight forward and provide clear diagrams. According to them there may be the need to trim the heat shield on some models but they provide another excellent diagram showing exactly where to trim if this is needed for your truck. I have linked a few images for you to check out. They also recommend lifting the trucks rear end for better access to install base rails. The manufacturer does offer two methods of install based on your situation. Estimated...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Recommended Demco Hijacker Autoslide Compatible with 2012 GMC Sierra and 2021 GMC Sierra
    I have a solution for you, but Demco does not make a hitch that will drop directly into the pucks on a GMC truck, so you would have to use an adapter on the new truck. For the hitch, you can use the Demco Hijacker Autoslide # DM8550035; this hitch has a 21k capacity and will fit into industry standard base rails or the adapter mentioned below. I think it's always a good bet to go up to a higher capacity if there's a chance that you might end up with a trailer that's higher weight; so if...
    view full answer...
  • 5th Wheel Trailer Hitch and Install Kit for a 2016 GMC Sierra 2500 Long Bed
    First you will need an installation kit to mount the 5th wheel hitch in your 2016 GMC Sierra 2500 long bed. There are kits with rails above the bed and kits below the bed. The advantage of below the bed is that the bed is clear when the hitch is removed. If you want to go with above the bed rails I recommend Reese custom installation kit # RP56001-53. There is no drilling required to install the frame brackets and the longer rails and outboard frame brackets make installation much easier...
    view full answer...
  • Recommended 5TH Wheel Hitch With Underbed Rails For a 2016 GMC Sierra 2500 Short Bed
    I recommend the Demco Hijacker Autoslide 5th Wheel Trailer Hitch # DM8550022 for your 2016 GMC Sierra 2500 short bed. This hitch is rated for 18,000lbs and will automatically slide away from your truck as you turn, ensuring that your truck cab and trailer do not come into contact when you are trying to maneuver your 5th wheel trailer. And since it does it automatically you will not have to get out of your truck to reposition into a maneuvering position. The hitch will work with most 12"...
    view full answer...
  • Are There Replacement Brackets For DM8551010
    The brackets and hardware are not available as separate purchases, so you would need to get the full kit, which is the Underbed Rail and Installation Kit for Demco Hijacker UMS 5th Wheel and Gooseneck Trailer Hitches # DM8551010. I have added a link below to a video install for you to check out as well if you'd like to take a look.
    view full answer...
  • Parts Needed To Use Demco Hijacker With OEM Prep Package On 2021 Chevrolet Silverado 2500 HD
    Congratulations on the new truck! To change your Demco Hijacker Autoslide # DM8550022 that was made for the Underbed Rail and Installation Kit # DM8551010 on your 2017 GMC Sierra 2500 HD to work with your new 2021 Chevrolet Silverado 2500 HD W/ OEM Prep Package you will need to change the side plates and use a rail adapter. The correct parts are Replacement Side Plates for Demco Hijacker Autoslide 5th Wheel Trailer Hitches # DM6003 and Demco 5th Wheel Rail Adapter for Chevy/GMC OEM...
    view full answer...
  • Parts Needed To Install Demco Hijacker Autoslide With Underbed Rails On 2017 Silverado 2500 Diesel
    I definitely understand how the above bed rails can get in the way when your Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550034 is removed. There is a way to convert your Hijacker # DM8550034 to underbed rails but you will need to install the Underbed Rail and Installation Kit for Demco Hijacker # DM8551010 and remove your current above bed rail system. You can then use Replacement Side Plates for Demco Hijacker Autoslide 5th Wheel Trailer Hitches # DM6004 to allow...
    view full answer...
  • Best Auto Sliding 5th Wheel Hitch for a 2018 Chevrolet Silverado 2500
    The best auto sliding 5th wheel hitch for your 2018 Chevrolet Silverado 2500 is the Demco Hijacker Autoslide 5th Wheel Trailer Hitch. This hitch is rated for use up to 21,000 lbs, has an auto sliding base which provides up to 14" of front to back travel, and uses a rail free design that allows for full access to truck bed when the hitch is removed. If you have the factory rail kit then you are going to want to use part # DM8550035 for the hitch and part # DM6194 for the adapter. If you...
    view full answer...
  • Gooseneck Adapter that Fits Demco UMS Underbed Rail Kit of GMC Sierra
    For the UMS underbed fifth wheel rail kit you have installed in your 2015 GMC Sierra 2500 all you'd need is the part # DM5988 and you'd be set.
    view full answer...
  • 5th Wheel Trailer Hitch and Installation Kits for a 2015 Chevy Silverado 2500
    I will be happy to make some recommendations for your 2015 Chevy Silverado 2500. If the truck is a short bed then I recommend custom underbed mount kit # DM8551010 with the 21,000 pound rated auto-sliding HiJacker, # DM8550037. The underbed mount means that the bed will be clear when the hitch is removed for a clean look and a bed free of obstructions. The hitches slide automatically so you won't have to get out of the truck. And they travel 14 inches, the most of any slider we have, for...
    view full answer...
  • Underbed Fifth Wheel Hitch and Rail Kit Recommendation for 2016 GMC Sierra 2500 Short Bed
    For your 2017 GMC Sierra 2500 short bed we do have fifth wheel hitch rail kits that are underbed which would be very similar to the factory GM rail kit. My favorite option to recommend is the Demco rail kit part # DM8551010. The reason this rail kit is great is that it's underbed like you said you needed but also because it allows you to install a sliding hitch that slides automatically as you make tight turns. For that you'd want the part # DM8550022.
    view full answer...
  • Can Demco SL Series 5th Wheel Hitch be Used on 2018 GMC Sierra with Factory Pucks
    I spoke with my contact at Demco and unfortunately there is not a good way to convert the SL Series 5th Wheel Hitches like # DM6076SL-16K, nor is there an adapter available, that will allow it to attach to the factory pucks on your 2018 GMC Sierra 2500. Your only option is to go with a brand new hitch that is designed to mount to those pucks. For this I highly recommend the Curt A16 Slider # C16668 if your Sierra has the 6-1/2 foot bed or the fixed A16 # C16520-16025 if you have the 8...
    view full answer...
  • Recommended Fifth Wheel Hitch Setup for 2017 GMC Sierra 3500 to Tow 2020 Keystone Fuzion
    The Curt Q20 5th Wheel Hitch # C16671 that you referenced is a great option to tow your 2020 Keystone Fuzion if you decide to have your GM dealership install their factory below bed rails. We have some great aftermarket options for you that you can get from us here at etrailer.com. Aftermarket systems are typically less expensive than factory options without sacrificing safety, capacity, or features. For a complete underbed rail 5th wheel system for your 2017 GMC Sierra 3500 Denali,...
    view full answer...
  • Can the Andersen Ultimate Be Used on a 2018 GMC Sierra 2500 Short Bed
    I do have an option for you but the Andersen Ultimate Connection 5th Wheel Trailer Hitch System part # AM3200 or any of them for that matter will not work on most short bed trucks like what you have on your 2018 GMC Sierra 2500 because they do not provide enough turning clearance even with the offset adapter but if you want you can measure for this using the attached help article. Therefore, the only option you have is a sliding 5th wheel hitch or a fixed hitch with rotating pin box but...
    view full answer...
  • Best Kind of Truck and Hitch to Tow a 5th Wheel Trailer
    To start the best trucks for 5th wheel or gooseneck trailer towing are going to be 1-ton long bed trucks. With a short bed you can run into clearance issues when turning and additional equipment would be required in order to solve that problem. The best hitch for towing a given trailer is going to be the one that matches that type of trailer. So in other words the best hitch for towing a 5th wheel trailer is a 5th wheel hitch. So I do recommend removing the adapter that is on it and using...
    view full answer...
  • Will the Demco UMS Series Gooseneck Hitch Fit a 2015 Silverado 2500 Short-Bed?
    As long as the rails you currently have installed on your 2015 Silverado 2500 short bed are the UMS style rails, like the Demco # DM8551010, you can definitely use the Demco Hijacker UMS Series Gooseneck Trailer Hitch # DM5988. If you have another brand of auto slider and or rails, however, I cannot guaranty the fit.
    view full answer...
  • Parts Needed To Install Demco Autoslide 18K 5TH Wheel Hitch On 2019 GMC Sierra 2500 With UMS
    Yes, you do have the correct part numbers. For your Demco Autoslide 5th Wheel Trailer Hitch # DM8550034 the Side Plates # DM6003 are the part number 6003 you referenced. To mount on the Underbed Rail and Installation Kit # DM8551010 for your 2019 GMC Sierra 2500 you will need the Side Plates # DM6004.
    view full answer...


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Info for this part was:

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