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  5. 7 Round - Blade
  6. 7 Feet Long
Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long

Item # C56070
Our Price: $78.95
You Save: 29%
Custom Fit Vehicle Wiring

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Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56070 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (841)
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  • Used (1)

CURT Custom Fit Vehicle Wiring - C56070

  • Custom Fit
  • Fifth Wheel and Gooseneck Wiring
  • 7 Round - Blade
  • CURT
  • 7 Feet Long

Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.


  • Provides 7-way, blade-style connector in your truck bed for hassle-free hookup of 5th-wheel and gooseneck trailers
    • Connector mounts in truck-bed sidewall, tailgate post or wheel well
  • Retains factory 7-pole trailer connector at rear of truck (if present)
  • Plugs into factory wiring - no cutting or splicing
    • 7' Long, insulated wiring harness reaches from rear bumper to truck bed
    • Requires that truck have factory tow package
  • Custom fit for your vehicle
  • Includes zip-ties and self-tapping screws for installation


  • Harness length: 7'
  • Limited 1-year warranty

56070 CURT Fifth Wheel and Gooseneck OEM Extension Harness - 7-Way RV Blade Plug - 7' Long

Compare to Bargman 54701-003

Installation Details C56070 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Video of Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long

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

Video Transcript for Curt 5th Wheel Wiring Harness Installation - 2021 Ram 2500

Hey everybody, Ryan here at etrailer. Today on our 2021 Ram 2500, we're gonna be showing you how to install the Curt 7-way Round in-bed Wiring Kit. But before we do that, why don't we check it out and make sure that this is something that's gonna work for you. When it comes to an in-bed Wiring Kit like this one here, it's one of those things that aren't absolutely necessary but it sure does make sense and becomes convenient whenever you have your Gooseneck or 5th Wheel trailer hooked up. And that's because the Wiring Connector for your lights and everything are just gonna plug right into there, right into the bed. That's going to allow you to not have to take that Wiring Connector, drape it over your tailgate and run it all the way down to your bumper.

So, you know, it's the right way to do things, honestly at the end of the day. When it comes to this one, it's really convenient. It just tease right in to the back of your factory 7-way and that's where it gets all of its signals and everything from. So because of that, not only are you able to still utilize and maintain the 7-way connector on your bumper, but you're also gonna be able to get the one here inside of your bed. So not really a whole lot to these, one thing I like to touch on is the quality.

It's definitely not out bad by any means. Everything feels solid, the wires are nice and thick. Everything else, if you like the cap, there's a a good spot for you to get your fingers under there easy. So even if it was cold out and you had some bigger gloves on or something, you could still grab it and work with it. And then on the bottom side, there's another catch here.

So you plug your trailer connector in, the spring loaded cap kind of sits down on it and that catch will help prevent your trailer wiring from becoming accidentally pulled out. So it's a little peace of mind there knowing that this isn't just gonna fall out and then you lose all your signals and everything. So when it really comes down to it, if you have a Gooseneck or a 5th-Wheel, the Wiring Connector here, this will kind of just complete that package and have everything set up the way it's supposed to be. As far as the installation goes, it is really straightforward. Shouldn't really take you a whole lot of time.

You do have to drill a hole inside of your bed there to pass that connector through so you will need a hole saw. And once that's done, you kind of just push a wire through there, plug in the connector, screw it in and plug it in down at your bumper. So it really isn't, really isn't too complicated. But if you'd like to see how that's done, feel free to hang around. We'll go ahead and do that together now. To begin our wiring installation, we're gonna be here up in the bed of the truck and we need to create an opening, that way we can mount our bar connector plug. So generally speaking, right here in this area is a really popular spot. It's out of the way, but it's still easy to get to. And so I've done just kinda held it up and then I put a little mark there where I wanna drill. With that said, look in behind the bed and make sure you have the space behind there. You obviously don't wanna drill through here and then keep going and drill out through the outside of your truck. But we have quite a bit of room here and so I think we'll be all right. With that said, I'm gonna take my hole saw and put this through that. So a lot of times these trucks will have this extra piece of paneling here. And obviously once you get the main hole cut out, we can come back and get this portion cut out as well. Once you have that hole completely created, just to help or protect this exposed bare metal from drilling, I'm gonna take a paint stick and just get a layer of paint over it. Spray paint will work too but I found in the past using these paint sticks just kind of ring set over spray, get on the side and speed things up a little bit. So that's what I'm gonna use. So now what we can do is grab our new harness and we're gonna take the end that has the T on it, the two connectors, feed the surge to the bottom side of the truck. A lot of times this can be tight so you kind of have to just figure out which way it goes in the best and go from there. So you can pop in there and then drop it all the way down. And this side here, what you're gonna do is plug the connector into it. I do suggest using some Dielectric Grease to coat the terminals. That'll help keep it protected from corrosion and things like that. Put a little bit on there and then simply just plug that right in. From there, we will just line this on up. Here it's where we want it, it's where it looks square and good, so that looks all right. So like that and then we'll use the provided soft tapping screws to secure the stone. Now underneath the vehicle, here's where our wiring comes down. If you wanna mention, I did temporarily just pull off our spare tire. Just makes it, gives us a lot more room to work but you don't have to, it's your choice. But with that said, I'm gonna run my wire over here and I'm just gonna loosely route everything now. Once I have it all plugged in, then we can come back and zip tie it up and everything else. But our T connector is gonna eventually connect to our bumper connector there. So we need to remove that, you can push down on that pen and pop it free. And then we can take our T connector and again down here too I'm gonna put some more Dielectric Grease, both ends of it. We're just gonna T this in. So one end is gonna plug in our factory connector there. The other side will plug into the actual plug on our bumper. Just use some of the included zip ties just to secure wiring up, tied against our back bumper, run it across. I had a couple, maybe two foot of extra wiring that I didn't really need. So I just bundle rolled up and secured it out of the way over here. And that'll finish up our look at and our insulation of the Curt 7-way Round in-bed Wiring Kit on our 2021 Ram 2500..

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Customer Reviews

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long - C56070

Average Customer Rating:  4.8 out of 5 stars   (841 Customer Reviews)

Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.


2022 ram 3500 long bed. Was perfect length if you install it on the rear driver side of bed. In the video i saw of someone installing it they cut the hole then shoved the double connector end of the harness down from the bed. I found it easier to fish a string down the hole and then tie the string to the clip part of the single side of the harness and pull it up. That plug has to go through the hole straight or else it gets caught up and having the string tied to the clip helps pull it up and through the hole straight.


Great kit to add a trailer connector in the bed of your truck. Super easy to install, took 30 minutes start to finish.

Still works great to hook up my fifth wheel connector in the bed of the truck instead of having it hang over the tailgate.
William - 08/15/2023

2012 Ram 2500

Super fast install. Great product. I have a 21 Ram crew short bed and the 7’ is the way to go. 35 min install. Tested and works great. Instructions call for a 2-1/8 hole. I was able to use the 2” hole saw and remove and reinstall the grey plastic wire cover from the Y.


very easy to intall.the box it came in i was wondering if it was going to work the box was torn open


Super easy to install, plenty of wire to put the harness where ever you pretty much want in the bed. Quality wiring harness and connectors.

Plug and play, no cuttingsplicing wires. Highly recommended. Plenty of extra wire to put the plug where you want to in the bed. The trailer cord is held very securely in place. Installed on my 22 Ram 2500
Anthony - 03/14/2023


Very easy to install. Works wonderful for plugging in fifthwheel so there is no wiring over tailgate. And still able to maintain oem plug.

Excellent product! It was a very easy install and works awesome with existing wiring.
Joe - 03/16/2023


Worth every penny. Quality is great and it’s a true plug and play. Have had it over a year and no problem. About a 10 minute install

2016 Chevrolet Silverado 2500

Arrived today. Shipping was great and item makes for easy install for my 5th wheel RV.


I used this to tie-in my truck cap lights and power. I modified it with the connector for the truck cap. A year later still working great.

2017 Dodge Ram Pickup

Installed on 2017 Ram 2500 easy bolt on install,very well made, best part made in USA.


Couldn't be any easier. This made my 5th wheel hitch install a breeze and impressed the wife! HAHA. Thanks again.

2017 Ram 2500

After a year and 8000 miles use the Curt wiring harness is working just like new. Seems very much like an OEM quality or better product.

Ford F-150

It worked great,so good I took it off my truck I traded in and putting it on my 2022 f-150.I buy all my trailer and truck equipment from etrailer,good products and service! Fast shipping also!

Great,still working as it should.
Charles - 03/17/2023

2012 Ford F-350 Super Duty

Easy install. I would emphasize using a good high quality hole saw. Makes all the difference.


Very easy to place an order. These people work hard to help you get it right. However, my package arrived empty. Packing tape was slit and box arrived with nothing in it. Within 2 hours of contacting, I had a new package being shipped. Before I could even email them pics of the empty box, my new replacement order had already arrived!
That's freaking customer service! They definitely remember who the customer is, and I will continue to use them every chance I get.

2018 Chevrolet Silverado 2500

I like the replaceable connector end, and the 90 degree harness end that joins it, but 7' of wire for my application is about 3' too long. Extra wire just increases resistance. Would be nice if they made a 4' version.

2022 Ram 3500

Product is great. I think you should have put it in a plain brown box to hide the contents. It was soaking wet when I got it off the porch, including the instructions.

2018 GMC Sierra 2500

Nice product. Very simple install. Requires 5 holes to be drilled. All plug-and-play design. Even comes with zip-ties to tie it all up.


This order was for ITEM # C53CR which has the filler plate. The order somehow was changed or substituted for this part which works for the application but without the filler plate.
etrailer sent the filler plate separately and I performed the install which was fairly simple and with the plate installed looks completely like factory. I attached my camper to the bumper connector and all worked, I could not reach the bed connector due to cable length, this was set up for a new 5th Wheel we are purchasing. I am confident that is will work.
I used different wire ties, something a little more substantial than what was provided but that is my choice. Watch the install video, it is fairly straight forward, 30 minutes from start to finish for my install.
4 stars due to the confusion in the order but was eventually straightened away.


Install was very easy, wish it would come with some of that gel you’re suppose to put inside of it. Just needs a little and no need to buy a whole big tube of it. Haven’t used it yet but was everything I needed for my Fords new gooseneck. Didn’t want to plug it in at bottom of bottom of bumper

Has worked great
Nicolas - 04/15/2021

2017 Honda Insight

I purchased this unit after reading the reviews. I received both the C56070 and a B&W OEM hitch within a few days of placing my order. Etrailers’s customer service is excellent! The installation of this wiring harness took about twenty minutes including cutting the hole for mounting. Everything but the hole saw was included in the package! I am very pleased with my purchase!
Be sure to watch their installation videos prior to purchasing, they give real insight into the process!
The plug in is located in the bottom left corner of the photo!

2019 Dodge Ram Pickup

Great product! a 10 for sure.

7 foot cord was more than adequate. Good quality product. I installed on 2019 Ram 2500 Big Horn.
I will tell you dont even try the install without lowering the spare tire. Even if you are able to fish the wire over (like I did) you will not be able to make the connection to the existing 7 pinn on the bumper. the plug adapter is wired in such a way that you cannot get your hand and the wire in the right orientation. The install of the unit will be less than an hour and probably closer to 30 min.
One last tip, when reinstalling the spare be careful not to push the tire to far to the front there is a thin metal shroud that the tire will rub on and squeak over every little bump. test it before you are done, ask me how I know. LOL


Thanks for all the information on such a big and important purchase. Great photos and even better videos!

At first I looked for a shop to install my hitch, but after watching your videos I decided to go for it myself. If you read the directions carefully and have average wrenching skills the B & W underbed install for gooseneck was pretty straightforward.

It took perhaps 4 hours for me to install. Now I KNOW it was installed correctly and understand the hitch system to a t. Great product. Hooked up to my 15,000 lb fifth wheel and towed with ease using the Companion 5th wheel set up that is designed to be used with the underbed gooseneck.

Everything was delivered on time and in great condition and the quality of the B&W is outstanding. Thank you!


Easy Installation and reaches the drive rside.

I recommend this over wiring it yourself any day it doesnt matter if you have a 12 ton 1500 or 1 ton 3500. This simplifies installation by yourself, its literally an unplug the connection from the OEM Connection at your bumper plug and reconnect this extension.
David B - 03/09/2023


Hi George,

The wiring harness worked
perfect! Very pleased with it and I was able to reverse some very bad wiring that was previously done on my truck. It now looks and functions like a factory installed harness!

Show More Reviews

See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • 5th Wheel/Gooseneck Trailer Wiring Harness for a 2001 Ford F-250 Super Duty
    We do have a 5th wheel/gooseneck trailer wiring harness for the 2001 Ford F-250 Super Duty with the factory tow package. You can use # C56070. This same harness also fits some Chevy, GM, Dodge, and Toyota vehicles. The video I have linked shows it being installed on a 2014 but installation will be very similar on your truck.
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  • Where to Install Curt 5th Wheel/Gooseneck Wiring Harness on 2015 Ford F-350
    The Curt 5th Wheel/Gooseneck Wiring Harness # C56070 does need to be installed in your 2015 Ford F-350's truck bed, between the rear post and the wheel well, like in the accompanying photo. I have added a link below to the instructions and a video install on a Ford Super Duty like yours to check out of the Curt 5th Wheel/Gooseneck Wiring Harness # C56070.
    view full answer...
    Image 1 for
  • 5th Wheel Wiring Harness for 2003 Chevy Silverado 2500 That Retains 7-Way
    So it sounds like you are just looking for a 7 foot 5th wheel wiring connector for the bed of your 2003 Chevy Silverado 2500 and allows you to retain the use of the factory 7-way We do have exactly what with the Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56070. This harness will plug right into the factory 7-way tow package on your Chevy so you will still be able to use the 7-way on the rear of the truck. In regards to a hole, you are correct that you do need to cut one out on...
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  • Recommended In Bed 5th Wheel Wiring for 2022 Chevrolet Silverado 2500
    For 5th wheel wiring that will fit in your 2022 Chevrolet Silverado I recommend the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector # C56070. This wiring harness plugs in line with your existing 7-way so you can still use the factory connection at the back of your truck. This will provide you with the 7-way connection you need in your truck bed for your 5th wheel. I have attached an installation video for your reference.
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  • Can Curt 5th Wheel 7-Way Kit for 2022 Ram 1500 Install in Either Side of Truck Bed
    Yes, the 5th wheel/gooseneck 7-way kit part # C56070 can install on the left or right hand side of the truck bed of your 2022 Ram 1500.
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  • What Plug-and-Play Fifth-Wheel/Gooseneck 7-Way Fits My 2013 Chevy Silverado 2500?
    The part you need to install a 7-way round plug in your truck bed of your 2013 Chevy Silverado 2500HD is the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long # C56070. This includes a plug-and-play installation into your factory wiring without splicing.
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  • What Gooseneck Wiring Option do you Recommend for my 2020 Ram 2500
    The Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector part # C56070 is the perfect solution for you. It will plug in directly between the factory connector behind your bumper like you want. This is the most typical area and often where fifth wheel/gooseneck wiring kits get their signals. I have linked an installation video for you to check out on where and how it installs.
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  • Recommended 7-way Connector for Bed of 2021 Chevy Silverado 2500
    It sounds like you're wanting to add a 7 way receptacle into your truck bed cutout on your 2012 Silverado 2500; for that, I recommend using the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long # C56070. This will connect to your existing wiring and cutout to provide you with a spot to plug in your trailer's 7 way without having to crawl in and out of the bed. This will screw into your truck bed, so the existing hole shape should not matter in this case. I've...
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  • How Much Fender Clearance Does Curt 5th Wheel 7-Way Adapter Require
    I checked with Curt and the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7 Long Item # C56070 would require 7 inches of clearance on the inner side of the fender/bed wall to install.
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  • Identifying 7-Way Circuit Wire Colors on 2000 Ford F-150
    Since vehicle trailer wiring colors don't always match what they are supposed to be the easiest way to identify the circuit in question is to check out the picture I attached that shows the pin out of a 7-way.
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    Image 1 for
  • Recommended 7-Way "Y" Trailer Wiring Harness for Truck Bed Camper
    The only type of "tee" or "y" 7-way trailer wiring harness we really offer is one for in-bed hitches, the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector part # C56070. This will tie in-line with an existing 7-way trailer wiring harness and then provide an additional connection.
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  • 7 Way Truck Bed Wiring Harness for 2001 F250 Super Duty
    If you have a factory 7-way then you can add part # C56070. This wiring plugs into your factory wiring and the plug gets mounted in the bed of your truck. If you don't have a factory 7-way let me know what kind of trailer wiring your truck has now, if any at all and I can find the right parts for your application.
    view full answer...
  • Recommended Wiring To Install 7-way Connector In Bed Of 2014 Ford F-350
    I am sorry to hear you ran into issues installing a 7-way connector in the bed of your 2014 Ford F-350. I recommend using the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long # C56070 which has the correct wiring to go from your factory 7-way connector to the connector in the bed of your truck, but will include a 7-way connector that you can just keep as a backup as we do not offer the wiring separately. I included a video of the # C56070 being installed on...
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  • Gooseneck/Fifth Wheel 7-Way Adapter for Bed of 1999 Ford F-350
    It sounds like you are looking for a 7-way solution to install in the bed of your truck because you have an in-bed hitch like a gooseneck or fifth wheel and need a 7-way closer to it. So for that we have the Curt # C56070 which provides exactly that. It plugs inline with the 7-way at the bumper of your truck and provides you with a 7-way you can install up in the truck bed.
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  • Recommended Extended 7-way Wiring Harness To Add 7-way Connector In Bed Of Truck
    There is a connector that does exactly what you are wanting. I recommend the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long # C56070 which will plug in between your current 7-way connector and factory wiring harness, and has a 7' cord and additional 7-way connector which is designed to be used in the bed of a truck. I included a video of the # C56070 for you to take a look at.
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  • Adding In Bed 7-Way Trailer Connector on 2003 GMC 2500HD
    The factory connection that the the Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56070 should be on the harness that is plugged into your 7-way. This connection may still be clipped to the crossmember on the rear of the truck just behind the spare tire mount. You may need to remove the spare tire to get to this connection. If the factory connector was cut off the harness to install the 7-way you currently have, you will need to splice into the factory wiring with the bare wires on...
    view full answer...
  • What Fifth-Wheel Hitch Wiring Fits My 2022 Chevy Silverado 2500?
    If you need fifth-wheel wiring in order to use your hitch installed on your 2022 Chevy Silverado 2500, I recommend the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector # C56070. This harness is a custom-fit for your vehicle and comes with zip-ties and self-tapping screws for installation.
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  • Can A Sliding Fifth Wheel Hitch Be Used In A 2022 Ram 3500 Long Bed
    It's not needed but there's nothing wrong with using your Pullrite 2700 Automatic Slider 5th wheel hitch in your 2022 Ram 3500 long bed. It just means you'll have plenty of extra turning clearance and won't need to worry about the nose of the 5th wheel coming into contact with the cab of your Ram. If you don't already have an in-bed 7-way connector you can also install the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector # C56070 to make hooking up your trailer fast...
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  • Recommended In-Bed 7-Way Connector For A 2012 Dodge Ram Longhorn 3500
    To give you an in-bed 7-way connection while still maintaining the factory 7-way on your 2012 Ram 3500 Longhorn you can install the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector # C56070. This wiring harness will simply plug in-line with your existing factory wiring so that you can retain use of your Ram factory 7-way. I've attached an video below to help walk you through the installation process.
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  • How To Add Second 7-Way Trailer Connector On 2008 Chevrolet Silverado
    Yes, the product you're looking for is called an in-bed wiring harness like the Curt 5th Wheel/Gooseneck Custom Wiring Harness part # C56070 which is what I recommend. I am not sure what you'll be using this for so it may have more wire than you need but you can just tie the extra up and it will still work great, giving you an extra trailer connector.
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  • Will Adding an In-Bed 7-Way to a 2010 Ford F-250 Eliminate the Bumper 7-Way
    In order to install a 7-way trailer wiring harness in the bed of your 2010 Ford F-250 while also still allowing for the factory 7-way at the bumper, you are going to want to use the Curt 5th Wheel/Gooseneck Custom Wiring Harness part # C56070. I have attached a sample install video for you as well. The only thing you need for installation is a 2-1/8" hole saw.
    view full answer...
  • Will Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56070 Fit 2018 Chevy Silverado 2500
    Yes, the Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56070 referenced in your question is confirmed to fit your 2018 Chevy Silverado 2500 that is equipped with the factory 7- and 4-Way connector. This harness will plug in-line with the existing factory wiring on your truck to provide a 7-Way in the bed for easy hookup with your trailer. When installed, you will still be able to retain use of the factory connectors at the rear bumper. I have attached a sample installation video along...
    view full answer...
  • Will the Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56070 Fit a 2011 Ford F-250 Super Duty
    The Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector # C56070 will fit and work well on your 2011 Ford F-250 Super Duty. It is a fairly easy installation that most people can do at home. I have attached an installation video of this on a 2013 Ram 2500 for you to reference as well as the installation instructions.
    view full answer...
  • Wiring Diagram for 7-Way Wiring Harness C56070 to Install in Truck
    For your 2017 Chevy Silverado 3500 the 5th Wheel/Gooseneck Hitch Wiring harness part # C56070 would be the correct fit as your truck uses the standard 7-way round connector that this uses/needs. It is possible the wire colors you are working with aren't the same since they don't always match. Your best option is to wire by function using the attached picture as your guide if you made wiring changes. Otherwise if a circuit stopped working after the install of this the problem is most likely...
    view full answer...
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