bing tracking image
  1. Custom Fit Vehicle Wiring
  2. GMC
  3. Sierra New Body
  4. 2007
  5. CURT
FITS 2007 GMC Sierra New Body
Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long

Item # C56000
Retail:$167.95
Our Price: $117.95
You Save: $50.00
Custom Fit Vehicle Wiring
Confirmed to Fit
2007 GMC Sierra New Body

with factory 7-Way

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Call etrailer.com at 1-800-940-8924 for expert service. We are your GMC custom fit vehicle wiring experts, and offer a great price. etrailer.com carries a complete line of CURT products for your GMC Sierra New Body 2007. Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long part C56000 from CURT can be ordered online at etrailer.com. Complete custom fit vehicle wiring installation instructions and technical support.
  • All Info
  • Reviews (200)
  • Q & A (0)
  • Photos

2007 GMC Sierra New Body - Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long

  • 7 Round - Blade
  • Fifth Wheel and Gooseneck Wiring
  • CURT

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 GMC Sierra New Body's factory 7-pole.


Features:

  • 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
    • 10' 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


Specs:

  • Harness length: 10'
  • Wire configuration:
    • Yellow: reverse lights
    • Green: tail lights
    • Brown: right turn and brake lights
    • Blue: electric brakes
    • Black: 12V battery charge
    • Red: left turn and brake lights
    • White: ground wire
  • Limited 1-year warranty


56000 CURT Fifth Wheel and Gooseneck OEM Extension Harness - 7-Way RV Blade Plug - 10' Long

Installation Details C56000 Installation instructions

California residents: click here


Customer Satisfaction Score:


Customer Reviews

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long - C56000

Average Customer Rating:  4.8 out of 5 stars   (200 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.

by:
Ford Escape

Installation was very straight forward.
I
used some left over pieces of foam pipe insulation over the cable where it passed over the truck frame and th inner wheel well. I mounted the extended Seven Pin connector just forward of the wheel well just below the bed rail on the driver's side.
The umbilical from our 5th wheel reaches with enough slack to lay on the truck bed.
We picked up our Escape 5.0TA two weeks ago and drove about 3300 miles from WA to MI.
The plug was easy to plug in and unplug.
Overall a very nice product.

Ronald

4/12/2024

After 1 year still very satisfied with this product. Would buy again.

Etrailer Expert

Jerred H.

5/10/2024

@Ronald That's awesome! Thanks for the feedback!


by:

Worked great, I traded the vehicle that I installed the wiring adapter in tho. So it may be of use to someone else also.



by:

Initially worked great, but now it keeps losing connection to the camper. I had to plug the camper in to the 7 way on the bumper to get home. Everything would seem fine but then getting on the highway I'd get a warning message on the dash and lose lights/trailer brakes. Not something you want happening at 70mph.



by:
2016 Chevrolet Silverado 3500

Truly happy with this product and can't wait to go to work! etrailer sent me everything I requested and the installer had no problems. Everything was packed well in shipping with no problems.



by:

Product arrived overnight and I installed it upon arrival in order to be able to leave on a planned trip. Install was quick and easy and product was as advertised. I appreciated etrailer getting the order out immediately to me. Top rate company.



by:
2016 Ford F-350 Super Duty

This product makes it so simple to add a Fifth wheel plug into the bed. Installation takes maybe 20-30 minutes. I installed mine on the column at the tailgate so it is out of the way (less likely to get damaged by other cargo). The only issue I experienced with install was that due to the small opening in that column (from under the vehicle), I had to remove the gray wire cover and then reinstall it after feeding the wire harness up into the column. (This was minor) Would definitely recommend this as it is simply "plug n play" with no cutting of wires or crimping needed.

Richard P.

8/31/2017

Product and location has worked perfectly and keeps on doing so. Great product!



by:
2014 Ford F-250 Super Duty

Very pleased with etrailer.com. All product information and reviews help make decision very easy. Very quick delivery and installation instructions are very easy to follow. Purchased 5th wheel hitch and custom wiring extension for my 2014 F250.

Mike S.

6/9/2018

Thanks for the follow up. I’ve enjoyed the products ease of installation and use. I easily hook up my 5th wheel camper by myself and have had no issues. Great products!



by:
2021 Ram 2500

direct fit plug and play had no issues!



by:

Delivery was ahead of schedule. The product is top grade. I installed it myself which took all 45 minutes. Tested it on the trailer and everything worked perfectly.



by:
2016 Chevrolet Silverado 2500

The cord made the electrical part of installing my new fith wheel hitch very easy just plug in the connections and your done .

Kevin L.

10/23/2017

The products have worked flawlessly no problems and thank you for checking back with me its nice when a company cares about there costumers. Next time I need any trailer products I will definitely be contacting etrailer.



by:

Plug and play. Works great.



by:

The trailer wiring extension worked perfectly for my 2013 2500HD setup. It was easy to install and makes hooking up and trailering that much easier.



by:

Nice long wiring harness.



by:

Awesome product fit the truck just like it should and very easy to install keeps me from scratching the tailgate with a wire over the back of the truck easy to reach when hooking up trailer



by:

Working very well yet!



by:

Easy install and a great product. Used on 5th wheel rv trailer. No more wiring cord from trailer hanging over the end gate. Thanks!



by:

Went on in minutes



by:

Looks like an easy install good quality



by:

Customer service for product selection and order entry were excellent and focused on my interests and needs. The hitch, custom installation kit, and harness were shipped very quickly and arrived sooner than expected. Everything arrived in excellent condition. Assembly and installation instructions were very clear and specific, and I was able to assemble and install everything with no problems and in a very reasonable amount of time. Total cost was roughly half of what it would have been if I had purchased the products and had them installed by a dealer. I am very satisfied with my experience dealing with etrailer.com, and would highly recommend them to anyone shopping for towing products.

Peter C.

10/23/2017

Awesome. The hitch has worked great. Very, Very happy with the purchase,delivery, installation which I did myself, and performance of the product.Thanks again,Ill be sure to refer anyone who needs products you offer to you.



by:
2006 Ford F-250 and F-350 Super Duty

I'm a huge fan of completing wiring projects with no "hacking" into harnesses. This harness is plug and play. When I finished installing it, the underside of the truck looks like it came from the factory. Job done

Jim

3/4/2018

I havent thought about it for a year. I can give no higher praise for a product.it does its job very well.



by:
2019 Ram 2500

This is an easy install and seems well made. I probably didn’t need the 10’ long my truck called for but no problem zip tying up out of the way. Well pleased.



by:
2016 Ford F-350 Super Duty

I haven't installed it yet, however, I cut the inside bed wall in preparation for a spray-in bed liner before installing.
It looks just like the picture and description, arrived undamaged and ready for install. Great installation instructions!

Les

11/1/2017

Still using and I really like the hitch and other items I purchased a year ago. After installing the Curt fifth wheel hitch, Ive used it several times and I will be using it a bunch over rbe next several weeks. Easy to maintain and use.



by:

It worked exactly as it should. I did mess up on the hole location. I put it to hight and didn't allow for the depth. I had to make a 1/4" spacer to fill the gap.. my mistake.



by:

Worked perfect. Unfortunately 1 yr later at the bumper location (where the splitter is installed) I don't have reverse lights on my trailer. They still work from the new mount in the box, just not from the bumper location. It's possible it never worked from the beginning, as I didn't have a trailer with reverse light at the time, but I do now and they don't work... I understand I'm just outside of the 1yr warranty period too. My fault for not checking right away.



by:

This wiring harness made adding a plug in the bed of the truck for the gooseneck trailer a breeze. I didn’t really need the 10’ harness but I just looped and zip tied the excess. One year later and the plug still works great.


25
200
Show More Reviews

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

  • Which Companion 5th Wheel Hitch for 2016 Ford F-350 Equipped with B&W Gooseneck Hitch
    If you have a long bed truck, the B&W # BWRVK3500 you'd looked at would work perfectly. If you have the short bed, use the sliding model part # BWRVK3400-5W. The other hitch part numbers you mentioned are compatible with the tow prep puck system, and not the B&W Turnover Ball, so none of those would work for you. The Companion will work perfectly for you, as long as your 5th wheel doesn't have a rotating pin box like the Reese Revolution or Sidewinder or the Lippert Turning Point. If you...
    view full answer...
  • Gooseneck and 5th Wheel Trailer In-Bed Wiring Harness for a 2003 Ford F-350 Super Duty
    As long as your 2003 Ford F-350 came with a factory installed 7-Way trailer connector, you can use the Gooseneck/5th wheel in-bed wiring harness # C56000.
    view full answer...
  • Does Curt E16 5th Wheel Trailer Hitch And Universal Install Kit FIt 2011 Dodge Ram 1500
    The Curt E16 5th Wheel Trailer Hitch with Rails and Universal Installation Kit # C16116 is a universal fit so yes, it will fit your 2011 Dodge Ram 1500 with an 8 foot bed. Along with the hitch, if you also need a 5th wheel wiring harness for your 2011 Ram 1500, the correct part is the Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56000. I have added a link below for you to check out as well of the Curt E16 5th Wheel Trailer Hitch with Rails and Universal Installation Kit # C16116.
    view full answer...
  • Recommended 5th Wheel Installation Bracket/Bed Rail Kit for 2018 Ram 3500
    I'd recommend using the Curt # C16430-204 5th wheel install bracket/rail kit. This kit provides the industry standard 5th wheel mounting rails which are compatible with industry standard rail compatible 5th wheel hitches from Curt, Draw-Tite, Hidden Hitch, Reese, Valley, Husky and some B&W and Demco hitches, among others. If you'd like to install a 7-way trailer connector in the truck bed, you can do so using part # C56000. I'll link video showing how to complete the installation.
    view full answer...
  • Recommended UnderBed System for a 5th Wheel Hitch on a 2022 Ram 3500
    I have an underbed system for your 2022 Ram 3500 but unfortunately the dealer is correct. There are no aftermarket puck systems for you truck. The only way you will be able to add an underbed system is to use the Custom Installation Kit for B&W Companion 5th Wheel Trailer Hitches item # BWGNRK1320-5W. This will install in the holes already in your frame. You will not have to remove the bed of your truck. You will need to use the B&W Companion 5th Wheel Hitch item # BWRVK3500 or the B&W...
    view full answer...
  • Recommended 5th Wheel Bracket Kit for a 2021 Ram 2500
    For your 2021 Ram 2500 you will want the Curt Custom 5th Wheel Bracket Kit item # C16427. These brackets mount in pre drilled holes on your trucks frame. They will provide mounting points for industry standard 5th wheel rails. These brackets should be used with Curt rails. If you are looking for the entire set including the rails you will want the Curt Custom Fifth Wheel Installation Kit for Ram Truck - Carbide Finish item # C16427-204. To make towing with a 5th wheel easier I recommend...
    view full answer...
  • Bumper-Mount & Bed-Mount 7-Way Trailer Sockets for 2003 Ford F-250
    You can use the harness portion of kit # 40167 to plug in to the OEM wiring on your 2003 Ford F-250 but change out the socket part with part # HM40975 for use on your bumper. Then for the truck bed gooseneck harness you can use the 7-way # C56000 which will connect between the bumper socket and OEM wiring using round U.S. Car connectors.
    view full answer...
  • Recommended UnderBed Gooseneck System for a 2016 Chevy Silverado 2500
    Thanks for the picture! To add a 5th wheel hitch with an underbed system, to your 2016 Chevy Silverado 2500, you will want the Elite Series Under-Bed Gooseneck Complete Hitch item # RP30158-68. This system is identical to the factory puck system that Ford uses in their trucks. It has a 25,000 lbs and leaves your bed completely open when you are not towing. This kit includes the gooseneck ball and safety hooks you will need to tow your gooseneck trailer. To add a 7-way to the bed of...
    view full answer...
    Image 1 for Image 2 for Image 3 for Image 4 for
  • Recommended Installer for B&W BWGNRK1012 Turnover Ball on 2014 Chevy Silverado 3500
    We don't have any specific recommendations for installers. Frankly, any trusted mechanic should have no problem installing an underbed gooseneck/5th wheel mount like the B&W # BWGNRK1012. I'll link to the installation instructions as well as to an install video, so you can get an idea of what the installation involves. You can also print off the instructions and show them to your mechanic so you can get an install quote. If you'd like a 7-way trailer connector installed in your truck...
    view full answer...
  • Will the Curt Gooseneck Wiring Harness Part C56000 Work on my 2016 Ram 2500?
    Yes the Curt 5th Wheel/Gooseneck Wiring Harness 7-Pole part # C56000 will work out great with your factory plug. It is designed to plug in behind the bumper in line with your factory harness so you will still have full function on your existing plug.
    view full answer...
  • Recommended 5th Wheel Install Bracket/Bed Rail Kit for 2006 Ford F250
    The Reese # RP30035 Universal 5th Wheel Install Rail/Bracket kit is compatible with your 2006 Ford F250 but for a very slight upcharge, you can use a Curt custom install kit, part # C16448-204 that will require an estimated 1-1/2 hours less install time. Unless you're on a tight budget, the custom kit is the way to go. The kit will provide industry standard rails that are compatible with the Reese hitch you have. If you'd like to install a 7-way trailer connector/harness in the truck...
    view full answer...
  • 5th Wheel Trailer Hitch Wiring Adapter Retains Use of Rear 7-Way for 2008 Ford F-450 Super Duty
    There is a specific wiring harness for your 2008 Ford F-450 Super Duty that is a better fit than the 20023 wiring harness. You will need Curt 5th Wheel and Gooseneck Wiring Harness item # C56000. For this harness, your vehicle will have to have a factory tow package, which you have indicated that your truck does. The harness plugs in between the the OEM wiring harness and the factory 7-Way connector. You will still be able to use the factory 7-Way with this harness installed. I have included...
    view full answer...
  • Recommended Fifth Wheel Trailer Hitch in 2016 Ram 3500 with 8 Foot Bed and Factory Prep Package
    I suggest the B&W Companion Fifth Wheel Hitch # BWRVK3600 for your 2016 Ram 3500. B&W is one of the higher respected brands in the fifth wheel market because of how solid their hitches are. This hitch will fit into the factory prep package of your Ram so you'll also have a clear empty bed when you remove the hitch. One of its best features is the dual jaws that give you 360 degrees of contact with the king pin. This will reduce the rattle and jarring of your trailer. If you'd also...
    view full answer...
  • Can B&W Patriot 18K 5thWheel Hitch Be Made Compatible with Puck System on 2021 Chevy Silverado 3500
    B&W offers a replacement slider unit for the Patriot 5th wheel hitch, part # BWRVB3270. You'd simply remove the hitch head from the current stationary model and install it on the slider. This being said, the problem comes in when you try to find something to adapt the slider to the GM puck system. Demco states that their # DM6333 adapter isn't compatible with the B&W Patriot Slider. Curt offers a puck adapter, part # C88KR but neither Curt nor B&W will confirm fit, because the haven't...
    view full answer...
  • Under Bed 5th Wheel Hitch Mounting Option for 2021 Chevy Silverado 1500
    We don't offer a puck system that's similar to the OEM puck system, but we do offer a solution that would allow you to install a 5th wheel hitch in your 2021 Chevy Silverado's 6-1/2 foot bed without having bed rails sitting in the bed when the hitch is removed. You'll first install the B&W Turnover Ball gooseneck hitch, part # BWGNRK1019-5W in the bed of your truck which provides a mounting point for the B&W Companion sliding 5th wheel hitch, part # BWRVK3400-5W. B&W makes an excellent...
    view full answer...
  • Curt 5th Wheel Base Rails and Installation Kit For 2020 Chevy Silverado 1500 With 6-1/2 Foot Bed
    We do have 5th wheel base rails and installation brackets that fit your 2020 Chevy Silverado 1500 with a 6-1/2 foot bed, but the part number you mentioned is not a fit. Instead, the correct Curt install kit for your truck is the Curt Custom Fifth Wheel Installation Kit for Chevy/GMC # C65KR. These are a custom fit for your truck, which means you do not have to drill into its frame, which is not only good for your truck but also a serious time-saver. The other custom option for rail that...
    view full answer...
  • Is Drilling Into Frame Required During Installation of Curt Q24 5th Wheel Trailer Hitch
    I spoke with our contact at Curt and he informed me that for the Curt Q24 5th Wheel Trailer Hitch # C16245, along with the custom installation Rail Kit # C16411-204, no frame drilling is required during installation on your 2016 Chevrolet Silverado 3500. The brackets will simply mount to existing holes in your vehicle's frame. I have included a video demonstration of this product for your review. I also recommend a 5th Wheel Wiring Harness like the Curt # C56000. This will provide a 7-way...
    view full answer...
  • Measurements For Installing B&W BWGNRK1111 Turnover Ball Gooseneck Hitch on 2011 Ford F-350
    The B&W Companion # BWRVK3500 which is height adjustable from 16-1/4 to 18-1/4 inches above the bed floor, would attach to your 2011 Ford F350 using the B&W Turnover Ball hitch, part # BWGNRK1111. The Turnover Ball hitch mounts to that the truck bed so that the hole for the gooseneck ball where the Companion would install is 46-1/8 inches forward of the rear edge of the truck bed (the bed, NOT the edge of the tailgate). The Companion 5th wheel hitch pivot arms can be installed to set both...
    view full answer...
  • What is Custom about the Installation Kit for Gooseneck Hitches?
    The B&W Turnoverball Underbed Gooseneck Trailer Hitch # BWGNRK1016 has a custom installation kit for your 2017 Chevrolet Silverado 2500. This kit has the mounting brackets that are designed for the mounting holes currently in your Silverado's frame. This allows you to install the Gooseneck Hitch without having to drill into or weld onto your frame. I attached our install video of this hitch onto a 2017 Zchevrolet Silverado 2500 if you want to check that out below. Once you install a gooseneck...
    view full answer...
  • Comparing The B&W Underbed Gooseneck Hitch For Companion 5th Wheel On 2013 Ram 2500
    For your 2013 Ram 2500, the B&W Companion 5th Wheel Trailer Hitch - Dual Jaw - 20,000 lbs # BWRVK3500-5W is the same in both comparisons so the difference is in the gooseneck underbed rails. The Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches # BWGNRK1313-5W is a fit for DIESEL models only, and the # BWGNRK1308-5W is the fit for GAS models only on a 2013 Ram 2500. The components under the frame are different between the gas and diesel models, so make sure...
    view full answer...
  • Recommended 7-Way Harness For Fifth Wheel In Bed Of 2001 Ford Super Duty Truck
    We have just what you are looking for. The wiring harness I recommend for your 2001 Super Duty is the Curt # C56000. This plugs into the wiring at the back of your existing 7-way connector on your truck. After installing, you will have a working 7-way in the truck bed and also the 7-way at the rear of the truck. I have attached a link to an installation video you can check out. As you can see in the video, no cutting or splicing of wires is needed to install this harness. When working...
    view full answer...
  • 5th Wheel Hitch and Rail Options for 2016 Ford F-250 Super Duty Short Bed without Factory Rails
    The Reese hitch # RP30051 you selected is compatible with the rail kit, and the rail kit # RP50026-58 is confirmed to fit your 2016 Ford F-250. The custom rail kit mounts to existing holes in your vehicle's frame and minimizes drilling and install time, so it's a good choice for mounting your Reese hitch. The Reese hitch has a capacity of 16,000 lbs. Another option you might consider is the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs,...
    view full answer...
  • Can 7-Way/4-Way HM40975 be Used in Fifth Wheel Gooseneck Truck Bed Wiring Harness
    The only way to accomplish what you are looking to do is use the part # 40167 and then swap out the 7-way that comes with it for the # HM40975. We don't sell the # HM40975 in a gooseneck 7-way configuration because most people would not also need a 4-way up in the truck bed as well.
    view full answer...
  • Is the Curt X5 5th Wheel Base Rails Adapter Compatible with a Spray-In Bed Liner on a 2012 Ram 3500
    As long as the spray-in bed liner of your 2012 Ram 3500 is under 1/8 of an inch thick it will fit just fine. My contact at Curt said that they did build tolerances into the Curt X5 Adapter # 16310 to accommodate for that. If it is thicker than 1/8 of an inch you might have some problems though and you might want to remove a little bit of it if possible. The adapter is compatible with your Curt A16 5th Wheel Trailer Hitch # C16120 that fits standard base rails. I'm glad that you were looking...
    view full answer...


< Previous
123. . .32



Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jackie C
Expert Research:
Jackie C
Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Andrew K
Video by:
Andrew K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Video Edited:
Jeff D
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video Edited:
Kathleen M
Employee Chris R
Video Edited:
Chris R
Employee Zach D
Video Edited:
Zach D
Employee Cole B
Installed by:
Cole B
Employee Randy B
Test Fit:
Randy B
Employee Brent H
Test Fit:
Brent H
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee David F
Test Fit:
David F
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Updated by:
Amanda M
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.