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Reese Quick-Install 5th Wheel Base Rails Kit Installation - 2018 GMC Sierra 2500

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How to Install a Reese Quick-Install 5th Wheel Base Rails Kit on a 2018 GMC Sierra 2500


Shane: Hi, I'm Shane with etrailer.com. Today, I'm going to walk you. how to install the Reese above-bed rail kit on your 2018 GMC Sierra 2500. Adding the above-bed rail kit is going to give you the option to choose from many different fifth wheel hitches.This rail kit is going to be a more permanent installation, which means that your rails are going to bolt to the inside of the bed and they're going to stay installed even when your hitch is removed. That being said, they're not going to stick up very far, only about an inch, so they're really not taking up a whole lot of space. So it's going to give us plenty of room if we're wanting to put plywood or drywall in.Each rail is going to have three different slots for the feet on the fifth wheel.

It's going to give us the option to use different hitches with different weight capacities.This kit is also going to include custom-fit brackets that are going to mount to your frame rails. Both the bed rails and the custom-fit frame brackets are going to be heavy duty steel construction, nice durable black powder coat finish that's really going to help reduce the risk of rust and corrosion. They're going to stay looking nice for a really long time.Now that we've gone over some of the features, let me walk you through the installation. To begin our installation, we're going to lay one of our rails into our bed. What we're going to do is we're going to measure from the end of our bed, make sure it's not the tailgate, from the end of the bed, up the center.

Depending on what size bed you have. If you have the eight foot bed, make sure you follow those instructions for the measurement. We have six foot six bed, so we're going up 24 and five eighths. Keep in mind, inaudible 00:01:37 bed liner if you have one, we're actually going to go up 24 and 11 sixteenths, so we're going to go up to a sixteenth more to give us that added space for the bed liner.Once you get it marked, or once you get your measurement, you're going to mark that spot, and that's going to be to the edge of your rail. Mark the center.

Go to each edge, or each end, and do the same thing. Once you have your three lines for the edge of your rail, we know we're level with the back of the bed. Now we need to center it from side to side. We're going to measure from our wheel well, and just make sure we have an even amount on both sides. We're good there.

Now what we're going to do is we're going to take an eighth inch drill bit. For this back rail, we're going to go to the second hole in. You want to make sure before you do any drilling down below, check to make sure there's no wires, any hoses or anything like that in the way. We're going to go right in the center, and we're going to drill a hole here, here, and same thing on this side.Now what I'm going to do is I'm going to take my driver's side frame rail, and you'll notice at the ends are a little bit different. This is going to face forward, this is actually going to go over the frame rail. These holes are going to line up with the holes in the frame rail itself that we'll be putting hardware in later. What I want to do is the holes that I drilled on the top side in the bed, I want to make sure that they're lining up with these.You can see what I like to do is take a little screwdriver, you can leave your drill bit down there, and make sure that you're going in the correct hole. Then you can see our two holes that we're lining up with on the frame rail itself.Now that we know that our holes are lined up, we're going to open them up to nine sixteenths. You can use a step bit. If you don't have a step bit, if you have some drill bits, take some drill bits and just step each one up until you get to nine sixteenths. I like to actually use the bolt itself to test the hole to make sure that they go in good. We'll go ahead and start opening these up. Do that same thing with the remaining three holes.Now what we need to do is we need to get our hardware in our frame rail. You can see how I have this one. This one there is a large hole back on the back side here. You can also use this one. What you're going to do is take your pull wire. We're going to be using this hole and that hole. Go through, and come out the hole like that. We're going to take a large spacer block and a large carriage bolt. Thread it on the string end of the pull wire, slide your spacer block in, push it open, pull it out the hole like that. Again, we're doing this one, and this one.Now what we're going to do is we're going to take out frame rail, we're going to put it in place, and then we'll add our hardware onto the bolts. We get our bracket put in place. Again, make sure you're using the correct one for the correct side. Once you get it on, we're going to remove the pull wire, and we're going to do. We'll do one at a time here. Put on a conical toothed washer, make sure the teeth are facing towards the bracket, and you're going to put on a large nut. We're not going to fully tighten these right now. We just want to loosely install them to hold our brackets onto our frame rail. And you're going to repeat that same thing for the other side of the vehicle.Now what we're going to do. We have our frame rails on. I went ahead and inserted my two end bolts on my bracket to make sure we're staying centered. We're going to have to drill a fifth whole, and it's going to be towards the cap. It's going to be in the center right here. Now, before you drill this hole, just make sure that you remove your spare tire. Then we're going to open this up to nine sixteenths. It's a good idea to take some clear coat or some kind of Rust-Oleum paint and paint the bare metal, just to reduce the risk of rusting later on. You want to do that with each of your holes.If you'll notice where our bolt's coming down, the corrugation is different. We're going to have a spacer block that we're going to put in. So anywhere that you have this change where you're going to be putting your hardware, you want to make sure you use one of these so you don't smash that corrugation. For our very back rail, we're going to be using on the underside of the bed. For the front rail, we're going to have one that goes in the center, here, on the underside of the bed, and then you're going to have two on each corner on the topside of the bed.From here, we're going to put on the conical toothed washer, make sure it's facing up. Lock washer, and a nut. Then on our frame brackets, you're going to slide it in between the bracket itself and the bottom of the bed. Again, we want to make sure that we don't smash this corrugation down. And then the rest of the hardware is going to be the same.Now let's slide our base into our very back rail. We'll take our front rail, we'll get it into place. We're going to measure and make sure that we're centered from side to side, or even from side to side. We're going to mark the very front center hole, then we're going to use the very outside holes for our front rail. For our holes that we drill up here, we're going to repeat the process that we did in the back. Make sure you open them up to nine sixteenths. Again, just double check underneath, make sure you're not going to drill into anything.Once you get them drilled, go ahead and paint the bare metal. Set your rail in place. We're going to take our spacer block, as I mentioned before, and put it right over the hole like that. We're going to have two on this end, two on the other end. Once we get our bolts in on top, we can go down underneath and add our hardware on the bottom.Next we need to tighten and torque all of our hardware to the specification in the instructions. We're going to start with the underside of our bed. Tighten and torque all of those, and then we'll move to the bolts on the frame rails.Once you have all your hardware tightened and torqued to the specification in the instructions, go ahead and reinstall your spare tire, get your hitch put together and inaudible 00:09:58 rails, and you're ready to go.Again, I'm Shane with etrailer.com. I hope this video has helped you, whether you're still deciding or installing the Reese above-bed rail kit for your 2018 GMC Sierra 2500.


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Installed by:
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Test Fit:
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