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Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

Item # RP50066-58
Our Price: $356.95
Fifth Wheel Installation Kit

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Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails and hardware included. 1-800-940-8924 to order Reese fifth wheel installation kit part number RP50066-58 or order online at Free expert support on all Reese products. Great prices and Fastest Shipping for Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches. Fifth Wheel Installation Kit reviews from real customers.
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2019 Chevrolet Silverado 3500 - Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

  • Above the Bed
  • Reese
  • Custom

Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails and hardware included.


  • Custom brackets mount beneath your truck bed to provide attachment points for 5th-wheel rails
  • Base rails sit in truck bed and allow installation of 5th-wheel trailer hitch
  • Vehicle-specific brackets mount to existing holes in your vehicle's frame
    • Minimizes drilling and measuring
    • Cuts installation time in half when compared with universal bracket systems
    • Compatible with overload springs
  • Kit includes custom brackets, rails and hardware
  • Compatible hitches: B and W Patriot, Curt, Draw-Tite, Hidden Hitch, Reese, Valley and Husky
    • Will not fit Reese Elite Series (Signature Series) or Valley UBS hitches
  • Black powder coat finish resists corrosion
  • 5-Year limited warranty

50066-58 Reese Custom Quick Installation Kit

Installation Details RP50066-58 Installation instructions

Video of Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

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

Video Transcript for Fifth Wheel Trailer Hitch Installation - 2015 Chevrolet Silverado 3500

Today on this 2015 Chevrolet Silverado 3500 Crewcab, we're going to show you part number RP50066-58. This is the Reese Quick-Install Custom Base Rails Installation Kit for fifth-wheel trailer hitches. This is what it looks like when it's installed it the truck. With this part number you get the 2 bed rails you see here and all the hardware needed to install. This is the rail system that's been along for a very long time, and it's considered a 10-bolt system with 5 bolts on each rail. You have 1, 2, 3, 4, 5, and then the other 5 on the 2nd rail. It will be your normal 10-bolt system.

We'll take a look. We have multiple slots built in to the base rail. This will work with all Reese's older designs as well as their newer designed hitches that are out there. If we take a look at our frame bracket that comes with the kit, you can see it goes to the frame. It uses 2 bolts to hold it in place against the frame. It uses existing holes in the truck as well to mount up the frame bracket to.

Of course, you still have to drill through the bolt for the 10 bolts that go through the top. Next, we'll go ahead and show you how the kit installed. The first thing we need to do is go ahead and take some steps to go ahead and get our truck ready to install our hitch. We're going to go ahead and remove the spare tire. That will give us extra working room underneath. We're also going to remove our tires and wheels for the back axle to make access a little bit easier to the frame.

You don't have to do this, but it makes is a lot easier. If anything, raise the frame off the suspension however you can to have easy access to the frame on the outside. Next, we're going to go ahead and lower our spare tire shield. This will also be re-installed once we're done. We'll use a 13mm socket to remove this fastener here and one right here. Now, we need to go ahead and lower our exhaust to give us some extra working room as well.

I'm just going to use an old cargo strap and use it to pick the weight up off of it, and then, we'll go ahead and spray down the rubber hangers with some lubricant. We'll push, pull, and pry them off going all the way up towards the front as far as we can go. There's a special exhaust tool you can find at your local auto parts store too to make this a little bit easier. You can go ahead and loosen up the hanger at the flange where the exhaust bolts together, but we'll go ahead and try it by lowering our strap and see how much room we have. We have a pretty good amount of room. I think we'll leave it just like that. Our fasteners for our hitch are going to end up behind the heat shield here. What I like to do is go ahead and bend the heat shield up and out of the way using a floor jack or anything to push it up and out of thew way. Here's some extra room. I'm going to actually go and make a cut right here so I have something to fold up and out of my way, that way we can get our hand and have access for our tools through here. We'll do the same thing on this side as well. We'll go ahead and cut this square piece out of the way. We'll go ahead and use a jack to and just push out heat shield up and out of the way and up against the bed. The last little edge by the frame will probably get in the way too. We'll go ahead and just take our pry bar and just push it up and out of the way. Now, we got our truck ready to install our hitch. We'll go ahead and put one of the bed rails into the bed of the truck, and we'll measure out the location for it. From the edge of the bed, not the tailgate, from the edge of the bed back we'll measure out as described in the instructions. There are 2 different measurements for different bed lengths, for a 6' bed and 8' bed. We're going to using the 8' bed marks. We'll go ahead and take our base rail and put it up to our marks. Then, we'll go ahead and make sure it's center from left to right. Once you're satisfied with it being even left to right, we'll go ahead and start marking out our first holes. I'm using a 1/2" bit just to mark the center of our square hole. Here will be our center bolt hole. Now that we have our marks made, we'll go ahead and make a pilot hole first with a 1/8" bit. Then, we'll take a frame bracket and make sure it lines up with the holes we just drilled in the bed before we make them any bigger. We'll take one of our frame brackets, and you'll notice this edge right here from here to here is longer than this side here. The short side goes towards the front. These oval holes will line up with these round holes here. Let's go ahead and put our frame bracket up into place and make a note of our pilot holes we drilled first. Then, we'll go ahead and look up inside there to make sure they line up. It may help to have any extra set of hands to help hold it up to verify the alignment. We'll go ahead and drill out our remaining center hole here. Then, we'll go ahead and enlarge all of our holes up 9/16". At this point, we'll go ahead and start working with our frame brackets. We need to install this square block and this large carriage bolt inside the frame, and we'll pull it out through this hole. To help us do that, we'll use the provided bolt leader. We'll go ahead and run it through the hole and out the access hole on the other side of the frame. Here's our bolt leader through our round access hole. We'll take our block, thread it through the bolt leader into the frame, and then thread on our bolt, push it into the frame and then pull it out the hole. We're just going to leave the whole assembly sit like that for now. We'll repeat the same process for this hole over here. With the bolt leader in place, we'll go ahead and put our frame bracket onto our bolts. We can use our bolt leader to help keep the bolts in position. We'll go ahead and remove our bolt leader, and then, we'll install a 5/8" conical tooth washer. Make sure the teeth are what stays towards the hitch bracket, and then a 5/8" nut. Now, let's go to the other one and repeat the same process. Now, we're definitely going to leave these loose so we can move them around, maybe just enough where it snugs the bracket straight up against the frame. We're done with our passenger side for now. Let's go ahead and repeat the same process over on the driver side. On our driver side, the holes are a little bit obscured by the brake lines and the wiring, but you just go over the top of it, and there's plenty of room to work with. Next, we'll go ahead and align our brackets with our holes in the bed. We'll also install these U-shaped blocks. They'll go between the frame bracket and the corrugation of the bed. We did the same thing on both sides of the truck. This doesn't have to be super exact, but we've just got to have some material between the corrugation and the frame bracket. It may help to use a screwdriver to help manipulate it around as well. We'll go ahead and run our carriage bolts through our bed rail and then through our frame brackets. We'll go back underneath the truck and install our remaining hardware, which will be a conical tooth washer, a lock washer, and then a 1/2" nut. Now, we're going to use the same fasteners combination on all 5 bolts for our bed rail. Our center bolt will actually get one of these U-shaped blocks as well, and then, it will get the same fastener combination. Let's go ahead and work on our base rail. We'll just roughly put it into position, and then, we'll use our hitch to put it into place. In this case, we're actually using a Gooseneck adapter. This will properly space our rails for us. If you have a regular fifth wheel hitch, you want to try both of them out and make sure they fit okay before you cinch them down for good. With this in place, you'll want to go ahead and take a tape measure and check if we're square by going diagonal on both sides. Once we're satisfied with our rails being square, we'll go ahead and mark our holes. It's going to be different locations for the front rail. It will use these two holes on the very end of the rails on both sides. In the center, we'll use this hole as well. Just like we did before, we'll go ahead and mark our holes and then drill them out, working up to our final hole size of 9/16". When we drill these holes out, you want to be careful because there's some wiring, some brake lines, and a gas tank in the vicinity of the holes of the holes we're drilling. Let's go ahead and put our rail back into place after our holes are drilled. We'll need these U-shaped blocks again, but this time, they'll go underneath our rail on top like so. Sometimes, you'll have enough room to install them longways, but you see how it sits up. You want them sitting flat. In this case, we have to have them go with the truck and do the same thing to the other side. Then, we can install our carriage bolts. Now, we'll go back underneath, and we'll go ahead and install our hardware. We'll also go ahead and put our hitch back into place as well to help keep everything in alignment. I'll go ahead and put my pins in as well. This will help keep everything in alignment as we tighten it down a little bit later on. Now, we're back underneath our truck, and we'll go ahead and install the hardware just like we did on the rail towards the tailgate. This is the hardware for the rail going towards the front. This is good reason to lower our exhaust. We have plenty of working room to get access to our bolts up here. When we install our hardware on the passenger side, it's not too bad to get to. You have to lean over exhaust and work your way up in there and get the hardware installed. On the driver side, it's going to be a bit of a different story. You almost have to have an extra set of hands to twist the bolt from the top side while you hold the conical tooth washer, lock washer, and nut underneath and thread into it that way. Once you get it started, then you can go ahead and work it into place. With all of our hardware loosely installed, we can go ahead and hand tighten down our bolts. To do that, a 3/4" ratchet wrench works pretty good in this application especially over the gas tank. Now, we've tightened down our hardware, we'll tighten down our frame brackets to our bed rails first. Once we've got these bolts tightened down by hand, we'll go ahead and torque them down as specified in the instructions. We're using a crow's foot to get access to it and then torque it down. With our bed rail brackets torqued down to the frame brackets, now we'll go ahead and tighten and torque our frame brackets to our frame. We'll use a 5/16" socket for that. We're done with our driver side. We'll do the same thing on our passenger side. With the hitch bolts all torqued down, we can go ahead and reassemble the rest of our truck. We'll put up our exhaust, our heat shield for the spare tire, the spare tire, and the tires and wheels. We're going to put our exhaust back up. I'm going to go ahead and pull it back up with our strap and then work from the front towards the back. This one might be easier to just to take off and put on. Sometimes, it helps to use a screwdriver to help guide it into place to get it started. Once all the hangers are re-installed, we can go ahead and take our strap off, and we'll go ahead and put our heat shield back up for our spare tire. With that, that will finish it for our install of part number RP50066-58, the Reese Quick-Install Custom Base Rail Installation Kit for fifth-wheel trailer hitches on our 2015 Chevrolet Silverado 3500 Crewcab. .

Customer Satisfaction Score:

Customer Reviews

Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches - RP50066-58

Average Customer Rating:  4.8 out of 5 stars   (191 Customer Reviews)

Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails and hardware included.

2017 Chevrolet Silverado 3500

The installation instructions were detailed and clear. Did it by myself in about 4 hours. Inexpensive solution if you didn't get the 5th wheel prep package.

2011 Chevrolet Silverado

Received the product the very next day shipping was excellent. Boxes were well taped and secured and complete. This was installed on a 2011 Silverado 2500 HD with a 8 foot bed . My installation was straightforward ,followed the included directions , and it installed very easy. I only have two suggestions ,
Get the spare tire down and out-of-the-way and do whatever is necessary to get around the heat shield. I just cut a small section of mine away . I have done business with etrailer for about five years now. I use to price check and order everywhere off the Internet. I don't do that anymore because I always ended up back doing business with
For four reasons ... Best price around, quality products, great customer service from a live person, well packaged products with the fast shipping


Kit was pretty easy to install. Definitely watch the video. Some of the bolts are in tight spaces. Overall very good kit. Well constructed.

2016 GMC Sierra 3500

Fast shipping!! Installed on a new 2016 GMC Sierra 3500 Denali. Only issue was the exhaust heat shield.. It must be removed for easier access to install hardware. It takes about 3 hours to install with one person. Otherwise no issues. E Trailer is great to do business with!! Thank you

2017 Chevrolet Silverado 2500

Installed on 2017 chevy 2500. Square washers for the 5/8 bolts were to big to fit through the acess holes in pickup frame. I had to fish them through a bigger hole further up the frame rail. Other than that, excellent products. Once I found etrailer, its the only place I shop for trailer products

2015 GMC Sierra 2500

I purchased the Reese dual jaw slider and install bracket kit. Everything arrived in three days in perfect condition. After watching the install video and reviewing the enclosed instructions I installed the assembly myself. It took approximately 4 hours . As you can see I also did additional steps, cutting the rubber bed mat to fit around the rails. Also undercoating the brackets to blend in the wheel wells. Etrailer is definitely the place to go for all your RV needs.


Great product! Everything fit as it should. Customer service was great they help the entire way even when ups lost part of the shipment!


I purchased fifth wheel hitch rails. They were worked great. We certainly put them through a strong test. Unfortunately we got stuck on a very muddy, greasy road on a hunt. The fifth wheel was leaning at an angle but the rails held! I was extremely relieved and happy that they did. Thank you etrailer.

Steve A.



2019 Chevrolet Silverado 3500

Hi Carol.
I got the package. I hope
to install next week. I’m also looking to put a 5th wheel electrical plug in the bed. 2019 Chevy 3500 with the factory prep for the wiring harness. Do you have a correct fit kit to do this?

Etrailer Expert

Mike L.


We do offer a 5th wheel wiring harness for your 2019 Silverado 3500. Id recommend the Hopkins # 41157, which you can see by using the link provided below. The harness plugs inline right behind the 7-way installed on your trucks rear bumper, between the trucks factory harness and the existing 7-way.

2019 GMC Sierra

Rail Mounting kit arrived in perfect condition, with all required attachment hardware and special bolt insertion tool. All items fit up as advertised on my 2019 GMC 2500HD std bed Sierra. Completely satisfied.

Ralph K.


After a year since installation and several trips with my 5th wheel, Im still completely satisfied with this rail mounting kit, It has operated perfectly with my Andersen Ultimate Rail Mount Hitch.


Easily ordered and delivered promptly

2019 GMC Sierra 2500

The rail kit installation went smoothly. I did the complete installation alone just to see if I could complete it without any assistance from anyone. (The installation honestly took me about eight hours which included quite a few breaks!) The only difficult task for me was installing the two nuts and washers on the front two bolts on the LH Frame Bracket due to the tight clearance around the large diesel fuel tank on my truck. As some of other folks mentioned, removing the spare tire and exhaust system heat shield are a must for installing the rail kit this model truck. The quality of the components is excellent. My wife and I will be pulling our 5th Wheel to the Georgia Mountains with this hitch this weekend!

2016 GMC Yukon

Installed a Reese custom rail kit (RP50066-58) on my 2016 GMC Denali 4WD DRW. It took approximately 3 1/2 hours to get it completely installed. I had to remove the exhaust heat shield and drop the spare tire but once I did it gave me easy access to the hitch frame brackets. I found it very informative to watch the online video first and took the advise of another persons suggestion to tape over the holes in the top of the frame (it kept me from losing the nuts & washers down into the frame). I simply followed the written instructions that came with the kit and the hitch was installed with out any real issues. I will say it did come in handy to have someone to assist me with some parts of the installation (just to keep me from having to crawl in/out from under the truck to get tools etc). As a side note, if you had access to car lift it would make the installation much faster and easier. I didn't have access to one and it was a little tight but as I said it wasn't all that bad.

I would definitely recommend this product.


Frame brackets were a perfect fit and easy to install. Installing nuts on the rail's proved a little difficult on my vehicle 2018 GMC due to limited clearance over fuel tank and truck frame and exhaust shield (definitely a 2 person job). Otherwise I am perfectly satisfied with the quality of the kit and easy to follow instructions. I would recommend this kit.

2014 Chevrolet Silverado 3500

Rail kit was great and etrailer was great with fast and free shipping.
Only advice: I installed this kit on my 2014 Chevrolet 3500 and I would not do it again.
I'd spend the extra money and get the RP56001-53 kit...much much easier to install
If you have time and patience, it's worth the savings. Otherwise save yourself the tight quarters of trying to get to those bolts above the frame rails.
I suspect this kit was an earlier design that was or should have been superseded by the later one.


Noah was awesome. It was so nice to actually speak to someone. He also knew the products and was very knowledgeable. I will be buying more from them!

2013 GMC Sierra

Although the Rails won't be installed until my new truck comes in mid April, I fully expect the product to be as advertised. I was recommended to your site and product by salesman from major manufacturer of the 5th Wheel Hitch currently used.



Has been a year and Product has worked out just fine !!


An installation of brackets are never easy due to items in the way but following the instructions made it doable

2017 Ram 2500

after getting the right fifth wheel suport kit for my 2017 chevy 2500 hd the insulation went in just as they say in the instructions thanks again etrailer for providing a product and service


I received my order in a timely manner when I opened the order it was shot a package of hardware I called etrailer they immediately sent me the missing Hardware I'm very satisfied with my order thank you

2011 GMC Sierra

Excelent product. Made the install much easier than it needed to be. The video helped a lot. Access to some of the bolts were very difficult (ones above the gas tank). Dropping the spare tire made it easier. Biggest problem was removing the heat shield as on my truck the darn Torx screws stripped. I ended up cutting most of the heat shield off. Bottom line, this is a great product, very heavy duty and very versatile.

Jason W.


Still working great.

2015 Chevrolet Silverado 2500

Installation photo

2016 Chevrolet Silverado 2500

Excellent product. Installation of washers and nut on front passenger rail under bed a little difficult. Probably worth the extra cost to buy the outboard brackets and longer rails. Removal of spare tire required.

Etrailer Expert

Laura E.


Thanks for your review, Ron. We note that removal or lowering of the spare tire is only temporary.

2016 Chevrolet Silverado 3500

These rails were a perfect fit on my previously used 5th wheel hitch. I am installing them myself on my 2016 GMC 3500 Sierra. However, the time it has taken, has been longer than advertised. I am stuck with three unreachable bolts. I am 63 years old with arthritis, so it is a challenge. I am very pleased with the service that e-trailer has provided me on instructions. With them, Installing the rails is a straight forward project even for this rookie. I am not pleased with the box that the rails were shipped in. It was too large a box and the rails tore the box apart. The bag of ten bolts, nuts, washers and spacers was also ripped open. Fortunately all was accounted for.

2015 Chevrolet Silverado

I really appreciated the very informative videos etrailer provided for the install on my 2015 Silverado 2500. I was able to focus my efforts on the high degree of manual dexterity required to mount the rails to my truck without the assistance of a lift. It was a very rewarding experience and I was shocked to learn the positions I could get my aging body into under that truck.
Couple of Tips from me to the next guy:
1) Use electrical tape on lead wire coil and bolt. Too nerve racking pulling on that wire and hoping it wasn't going to yank free of the bolt.
2) When you go to install the washer, lockwasher, nut combination, put a piece of duct tape over the hole in the top of the frame. When (not if) you drop the nut it will bounce off the tape rather than making the nothing but net swishing sound on it's way into your truck frame.

Really solid hitch. I'm very satisfied with the purchase.

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