Bargman Custom Fit Vehicle Wiring Harness Installation - 2017 GMC Sierra 2500

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How to Install the Bargman Custom Fit Vehicle Wiring Harness on a 2017 GMC Sierra 2500


Today on our 2017 GMC Sierra Denali 2500HD, we're going to be taking a look at, and showing you how to install, the Fifth Wheel or Gooseneck 90-Degree Wiring Harness with Seven-Pole Plug.This is what our seven-way plug in harness looks like installed. Now, this is going to give you all your necessary lighting functions, and it's going to solve your issue of having to drape your plug over and above your tailgate. Now the cap is spring loaded; that way, when you're not using it, it stays nice and tight and sealed, and keeps any dirt and debris and moisture out.It also has a clip right here, which when you do have your seven-way plugged in, it'll help that from getting pulled out accidentally. Now, there is some raised lettering on the cap. That actually will tell you what each terminal inside is used for.One of my favorite things about this is it's super easy to install. Everything is just plug and play.

I'll show you how to do that now.To begin our install, we're going to want to first determine where we want to mount our plug. We're going to go back on the driver's side, right here in this area. Now, before you decide where to mount it, it's always a good idea to get underneath the truck and check and make sure there's nothing behind it. If there is, you're going to have to pick a different spot.Once we determine our location, we can take a quarter-inch drill bit and drill a pilot hole. Now we can take our hole saw and drill a larger hole.

It's a good idea to put a little paint over our bare metal. That way, it doesn't rust or corrode.Now, we can take our harness and the end that has two connectors. We'll go ahead and slide them through the hole. Just fish it all the way down. Now we can take our provided self-tapping screws, hold our plug straight, hold inaudible 00:02:17 down.This is where our harness came out and down, and I ran it up.

There was quite a bit of slack, so I bundled it up up above this plate, secured it there, and then ran it towards the rear . and it dropped down right here.Now, we're going to plug our new harness in, into our seven-way plug. Now this already has an additional plug that we're going to tap into. If you we're to need to go to your original seven-way plug, it would work the same exact way. It's just all plug and play.I didn't release that safety cap, separate the two connectors.

Actually, to help prevent corrosion, we're going to be using some dielectric grease on the terminals. If you need some, you can find it on etrailer.com.What we'll do is take our new harness and plug it into one end, and you'll hear a clip, and you'll know it's secure. And we'll just take the other end, plug that in, you'll hear a clip. Now we can secure everything out nice and tight. And test it to make sure it all works.Our brake lights, our left blinker, our right blinker, our running lights, our brake controller, and our backup lights.And that'll do it for our look at, and installation, of the Bargman Fifth Wheel or Gooseneck 90-Degree Wiring Harness with Seven-Pole Plug for our 2017 GMC Sierra Denali 2500HD.


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Employee Joshua S
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Employee Jacob T
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