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2001 Chevrolet Impala
CURT

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

Part Number: C51451
175 Reviews | 46 Questions
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$14.20
Retail:$21.95
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2001 Chevrolet Impala

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Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your controller and then plug the other end into the built-in port beneath your vehicle's dash. 1-800-940-8924 to order CURT accessories and parts part number C51451 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In. Accessories and Parts reviews from real customers.
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CURT Accessories and Parts - C51451

  • Trailer Brake Controller
  • Wiring Adapter
  • Plugs into Brake Controller
  • CURT
  • Vehicle Specific

Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your controller and then plug the other end into the built-in port beneath your vehicle's dash.


Features:

  • Plug-in wiring adapter allows for quick, simple installation of your electric trailer brake controller
  • No cutting or splicing required
    • Custom connector end plugs into the built-in port beneath the dash of your vehicle
    • Other end plugs into the back of your electric brake controller
  • Compatible with time-delayed and proportional brake controllers from Curt
    • Brake controller must have built-in plug for adapter to connect - will not work on controllers with pigtail wiring harnesses
  • 2' Long, 12-gauge wires have protective covering to deter damage
  • Limited 1-year warranty


Installation of Curt Brake Controller Adapter

To install your Curt electric brake controller, you need to connect the wiring of the controller to your vehicle. Certain auto manufacturers offer pre-wired options, typically known as tow packages, wherein wiring is run for you from the dash to the trailer connector on the back of your vehicle. When this is done, a port is installed at your dash so that you can easily plug in a brake controller.


This adapter plugs into the port on your vehicle's built-in brake control wiring harness. The port is located in the wiring panel underneath the dash, to the left of the steering column, near the emergency brake pedal.


No hardwiring is required to install this adapter. After you plug it into the factory port, you simply plug the other end of the adapter directly into your electric trailer brake controller. Because there are no wires to connect, installation is not permanent. You can unplug and remove your brake controller at any time to transfer it to another vehicle or securely stow it away.



51451 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C51451 Installation instructions

This Product Fits The Following Vehicles






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Customer Satisfaction Score:

Ratings & Reviews

4.7

175 reviews
5 Stars
(148)
4 Stars
(16)
3 Stars
(3)
2 Stars
(5)
1 Star
(3)
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by:
The pigtail was nice. But the brake controller was junk. Never could get it to work right. Got tired of messing with it so I gave it away and bought just a simple controller and it does what I need it to do. All the setting just made it more complicated than it should.
by:
Nicely constructed cable but the end that mates with the GMC interface does not lock in place and will occassionally fall out cause the control to be inoperative. Have to stop the vehicle and get under the dash to plug back in. Very inconvenient. Not sure if the issue is with the cable or GMC's interface.
Greg Z. profile picture

Greg Z.

3/13/2026

The plug on the interface end does not lock in place and easily falls out of the interface module if bumped. Otherwise works fine.

by:
Quality product made my install simple and neat!
by:
2015 GMC Sierra 1500
Excellent product, made hooking up my brake controller super easy and fast.
Fast and easy ordering from etrailer good people to deal with.
Thanks
Ray profile picture

Ray

4/9/2019

PRODUCT WORKS PERFECTLY. JUST WHAT THE DOCTOR ORDERED.

by:
Works great. Easy to follow online installation instructions for the wiring adapter - no problem!
Bob B. profile picture

Bob B.

9/2/2015

It works just fine, no problem at all.

by:
Don't get much easier then this. The installation video was top notch , easy to follow and accurate. Thank you E-trailer
Ray L. profile picture

Ray L.

5/29/2016

Great product great company!!!

by:
I love this product. I have had many tow vehicles over the years. Wiring a brake controller always took a little time. This plug in device makes the job simple.
It and etrailer both deserve 5 stars.

RB
by:
After waiting for almost 1 month I finely received my order had too return one order that was not mine and had to wait until I got instructions on returning it. I have placed 3 different orders with etrailer but the last one was a mess, I don't known where you get the people that work in shipping but I think that a 4 year old could do a better job also when you have a complaint U wind up talking too four or five different persons and no one knows what you are talking about the only person that was of any help was Kim P thanks young lady
by:
2014 Chevrolet Silverado
E-Trailer had exactly what I needed for my new model year vehicle that I couldn't find elsewhere. The product was accurately described and the installation manuals were available online which helped tremendously in making a purchasing decision. The order was placed on a Sunday and a shipping notification was received on the same day literally minutes after the order was placed. Item was received within 3 days...can't ask for better than that.

I have bookmarked this site for future business...very efficient.
by:
This thing does everything you could ask a trailer brake controller to do. Easy to install, easy to adjust, and performs flawlessly. And it is priced right where it should be.
by:
The screws for the bracket did not fit into the plastic bushings in the bracket. I have got hooked this up to a trailer with brakes, yet, but everything else seems to work, including the adapter for my Silvy1500. Note that this review bears no negativity on etrailer, but he manufacturer of the brake controller. Stop letting China manufacture our goods and get better product reviews. I have had good experiences with etrailer.com, they always ship fast and deliver quality installation guides. Kudos to them!
by:
2014 Chevrolet Silverado 1500
This is my first order with etrailer.com . The Curt Custom Wiring Adapter was as advertised and came on time as promised.
I had shopped around at All the big three auto parts places (except "NAD*) only to get the same answers: "You have to splice those things to mak'em work"....cost could be around $50-150 bucks" OR " We can't get the connectors from our company". This was not true.
Glad I found "etrailer.com . Thank You ALL. :)
by:
2015 Chevrolet Silverado
The connector was part of a kit which included the trailer brake. Everything worked as advertised. Plug and play in my 2015 Silverado.
by:
Easy installation for brake controller only Con was there were no instructions provided as to where on the fuse block to plug it in. Had to research website for info. Mirrors fit perfect and allow to see rear of 26 ft trailer for up coming traffic
by:
Made wiring of the spectrum brake controller super-simple. Just plug this end in here and that end in there. Quick youtube search told me where the "there" was on the truck was before I ordered it.
by:
This controller is fantastic. Works very well very precise easy to use need I say more.
And the Customer Service I got from etrailer was second to none
by:
2015 Chevrolet Silverado 1500
The controller arrived quicker than expected along with the wiring harness. Installation, with your instruction, was painless and simple.

I choose to use velcro to mount my accessories, and in the pictures you can see this is a simple fast method. Plus, I can always remove it easily if need be.

Great product, great support, great prices.

Steve
by:
2014 GMC Sierra
I recieved this brake controller order on time. I installed it in my 2014 GMC Sierra in about 30 minutes. It work fantastic. I am extremely happy with my purchase from Etrailer.
by:
2002 Chevrolet Silverado
Ok, I just found a package from you guys on my porch when I got home. I'd gotten an email today that said it'd been delivered, but I KNEW that was a mistake because I'd just ordered a couple days ago, paid ZERO for standard shipping, so was certain there was no way anything got here already. Get home, it's ALL there!!!!! It's all exactly what I ordered, and I'll be providing reviews of the stuff as I get it installed and used. But as for etrailer? Nothing but awesome!!!!!!!!! Amazing job. Now THAT'S customer service!
by:
2015 Chevrolet Silverado 1500
Must have "accessory" for the brake controller. Made install a snap. YouTube video was very helpful in locating the vehicle's plug in.
by:
2015 Chevrolet Silverado 1500
Excellent delivery time. Easy to install. All the parts were included to make it a professional easy installation. No problems and the Curt wiring adapter was a good investment to insure a professional job.
by:
Recieved almost overnight. I haven't installed it yet but I'm sure like all Curt product it will be a snap. If I have an issue, etrailers excellent record of customer service will take care of any issue.
by:
Made installation of the brake controller very simple. Plug it in and it works, no splicing, soldering, or taping. Awesome.
by:
Perfect fit and made the Curt brake controller install quick and painless.
by:
I’m not sure if this part is good or not because it is part of a trailer brake choice that doesn’t work well. It is possible that this is the problem, but no one seems to be able to tell me what the problem is.
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See what our Experts say about this CURT Accessories and Parts

Do you have a question about this Accessories and Part?
  • Is Curt Venturer Trailer Brake Controller a Plug-and-Play Option on 2014 GMC Sierra?
    If you have the factory tow package on your 2014 GMC Sierra 1500, which from your description it sounds like you do, then the Curt Venturer Trailer Brake Controller # C74VV is plug-and-play. All you need is the Curt Custom Wiring Adapter # C51451; one end plugs into the brake controller and the other end plugs into the port beneath your dash.
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  • Adapter for Curt Brake Controller for Use in 2010 RAM 1500
    Thanks for letting us help Ken. The CME-D253068 Curt part number you referenced appears to be an inventory or stock number associated with the Curt TriFlex NEXT Trailer Brake Controller # C36GV. For your 2010 Ram 1500, you'll want the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51438. This adapter allows you to connect your Curt brake controller directly to the factory brake controller port on your truck, making installation much easier without having to splice into the...
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  • Recommended Brake Controller Wiring Adapter For 2019 Chevrolet Silverado 2500 HD
    For your 2019 Chevy Silverado 2500 HD there are many adapters. Here is the list based on brand: Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # 3016 is the adapter you need for Tekonsha and Draw-Tite Brake Controllers. Curt brake controllers will use # C51451. Hayes controllers will use # HA81798-HBC. Hopkins controllers will use # HM53075. For a more universal pigtail, you can use # 3016-S. I've also attached an article on GM Full Sized trucks with the factory...
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  • Where Is The Trailer Running Lights Fuse On a 2014 GMC Sierra 1500
    For starters, the Curt TriFlex Trailer Brake Controller part # C24VV and Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51451 have nothing to do with the running light circuit. The most likely cause of this issue is a blown fuse on the vehicle. For your 2014 GMC Sierra 1500, the running light fuse is in the #15 position on the fuse box which is labeled as "Trailer Park Lamps".
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    The install procedure will depend on if you have a 1500 or a 2500/3500 Series. If your Sierra is a 1500 model, you will need a brake controller wiring adapter harness, part # C51451. The 2500 and 3500 series would have the tow package wiring that sits above where the driver's left knee sits. If you click the video link I've provided, you can see a controller being installed in a 2014 GMC Sierra 1500. The FAQ link I provided shows how to install a controller in the 2500/3500 model. The...
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    In order to install a Curt TriFlex Trailer Brake Controller part # C24VV on a 2015 Chevrolet Silverado 1500 you'll need the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51451. It will indeed plug into a port under the dash making for a no-splice install.
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  • Is Curt Spectrum Trailer Brake Controller a Good Option for 2018 Chevy Silverado 1500
    The Curt Spectrum Trailer Brake Controller # C51170 is a great choice for a brake controller in your 2018 Chevy Silverado 1500 because it is easy to use with the control knob you referenced and is a proportional controller so you will get smooth braking. To install it in your '18 Silverado you would also need the Curt Custom Wiring Adapter # C51451. The only other brake controller I recommend checking out is the Curt Echo Mobile Trailer Brake Controller # C51180 because this is even easier...
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    We do have a plug-in adapter for your 2006 GMC Sierra, but the Curt # C51451 that you referenced is a fit for Chevy Silverado and GMC Sierra pickups starting in 2014. For your 2006 Sierra you want the Curt # C51352 instead. This adapter will plug into the junction box beneath your vehicle's dash as is demonstrated in the attached photos.
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    Image 1 for Image 2 for
  • How Does Brake Controller Install in 2014 GMC Sierra 1500 Using Factory Install Harness
    The brake controller jumper wire you found in the glove box can be used to wire in the brake controller you have. I am not sure which controller you have but basically you'll plug the harness into the port under your dash for the brake controller install and then you'll wire it color for color to the brake controller's wiring and it will be wired in and ready to work.
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    On your 2014 GMC Sierra 1500 there is a junction box with a black cover on it located on the driver's side floorboard, way in the back, to the left of the brake pedal. There should be an empty spot to plug in the wiring harness located in the upper left corner. I have included a link to a video that should help. It is a different harness but it plugs into the same spot.
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    The Curt # C51451 wiring harness isn't the correct harness for your 2013 Toyota Tundra. For your Tundra, you'll want to use # C51362 which is the correct harness for you truck. If you click the provided link, you can see an install video as well as a demonstration video showing how the Curt # C51170 Spectrum brake controller works.
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  • Troubleshooting Curt TriFlex Brake Controller on a 2017 Chevrolet Silverado 2500 With OL Code
    The Curt TriFlex Trailer Brake Controller # C24VV does have a sleep mode that will not have any lights on when the controller is not being used. It sounds like you have a short somewhere in the brake wire that runs to the 7-way since your controller is trying to calibrate when there is not a trailer connected. That also explains why you are getting the OL afterwards. The short could be inside one of the connectors or the wiring may have chaffed somewhere on its way from the controller...
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  • Does 2018 Chevy Silverado 1500 Need to be Programmed for Aftermarket Brake Controller to Work
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    Wow, you've really done a thorough job at testing the functioning of the Curt TriFlex # C24VV and Wiring Adapter # C51451 on your 2018 Chevy Silverado 1500. The only other thing I can think to do is check the 7-Way on the back of your pickup. If the pins are corroded or the wiring is messed up inside the 7-Way connector then that would explain why you're getting the OL code. It's possible that some wires are crossing which would also explain why your brake lights are remaining on until...
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    You've started in the right direction with troubleshooting the Curt TriFlex # C24VV and Wiring Adapter # C51451 install on your 2018 Chevy Silverado 1500. The OL code that you're seeing means that the output circuit is being overloaded which normally means that there is a wiring issue somewhere. Disconnecting all of your wiring involved and inspecting the wiring itself as well as the connectors for any places where it might be damaged is what you'll want to do. If all of that looks good...
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    Yes, you can. If your 2014 GMC Sierra is a 1500 model all you would need is the Curt Wiring Adapter part # C51451 to install your Curt Venturer Trailer Brake Controller # C74VV. If your 2014 is a 2500 or 3500 the connections are available under the dash of your vehicle. You would want to wire the controller up to the wires under your dash. Check out the FAQ article I attached on how this is done.
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    The correct install harness for installing the Curt Echo part # C27JR in your 2018 Chevy Silverado 1500 is the part # C51451. It would be pretty cool if the display would integrate into the dash of your truck! Hopefully that happens at some point.
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    The Curt Spectrum brake controller part # C51170 that you referenced is a really great option for a brake controller for your 2020 Chevy Tahoe. All you'd need to install it is the install harness part # C51451 which plugs right into the port under the dash of your vehicle and then into the black connector of the controller. For an easier to install option the Curt Echo part # C51180 would just plug into your 7-way and once synced to your smart phone is ready to tow without anything that...
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Info for this part was:

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