bing tracking image
  1. Trailer Wiring
  2. CURT
  3. Trailer Connectors
  4. Vehicle End Connector
  5. 4 Flat
  6. 7 Round - Blade
Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat

Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat

Item # C57101
Our Price: $38.13
You Save: 42%
Trailer Wiring
Shipping Weight: 1.12 lbs
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
Replace your Ford's or GM's OEM connector with this multi-function, vehicle-end connector. Features 7-way outlet, 4-pole flat outlet and an integrated backup alarm. Great Prices for the best trailer wiring from CURT. Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat part number C57101 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (40)
  • Q & A (0)
  • Videos (2)
  • Photos

CURT Trailer Wiring - C57101

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • 7 Round - Blade
  • Plug Only
  • CURT

Replace your Ford's or GM's OEM connector with this multi-function, vehicle-end connector. Features 7-way outlet, 4-pole flat outlet and an integrated backup alarm.


  • Replaces OEM 7-pole trailer connector on Ford and GM trucks
  • Supplies 7-blade RV and 4-wire flat trailer connections
  • Sounds alarm when vehicle is in reverse
  • Constructed of durable plastic


  • Applications: 1999-2014 Chevrolet Silverado, 1999-2014 GMC Sierra and 1999-2012 Ford F-250, F-350, F-450 and F-550 trucks
  • 1-Year warranty

57101 Curt Multi-Function Socket with Back Up Alarm - 7-Way RV Blade and 4-Way Flat - Ford, Chevy, GMC Trucks

California residents: click here

Video of Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat

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

Video Transcript for Curt Wiring - Trailer Connectors - C57101 Review

Today we're going to review part number C57101. This is the Curt Trailer Connector for Ford, GM and Dodge Trucks, with a factory 7-way. This includes a backup alarm, 7-way blade connector, and a 4-way flat connector. This part can be used to replace an OEM 7-pole trailer connector on your Ford, GM, or Dodge truck, or also if your truck does not have a connector at the time but has the factory harness underneath, you can find the plug that would actually plug into the back here. This does supply a 7-blade RV style plug, a 4-flat trailer connector right here. I'll just pop off the cap and show you, there's the 4-way. It also supplies this integrated back up alarm. It is constructed of a durable plastic.

Has the nice heavy duty lid with the seals on it to help protect the terminals on the inside there. It also has the dust cover on the 4-way to help protect that 4-way. It does come with the mounting bracket and the hardware for the mounting bracket. Again this is designed to fit on any of the Ford, GM and Dodge trucks that come with the factory 7-way OEM towing package harness. Basically what you would do is take your mounting bracket, slide that through, slide that so the holes line up. Once the holes are lined up take your bolts and nuts and install it to that. Then you'll see at the top you have two holes here to install this bracket to your vehicle.

Then you can take your 4-way and then just go ahead and slide that on just like that to hold your 4-way. Once it's all installed it'll look just like that, so you'll have access to your 7-way, have access to your 4-way, just like that. Again over here you can see there's three small lights, but the main thing is it gives out an audible sound for when you go into reverse to back up. That should do it for the review on part number C57101. This is the Curt Trailer Connector for Ford, GM and Dodge trucks, with a factory 7-way, with a back up alarm here, 7-way blade and a 4-way flat. .

Customer Satisfaction Score:

Customer Reviews

Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat - C57101

Average Customer Rating:  4.7 out of 5 stars   (40 Customer Reviews)

Replace your Ford's or GM's OEM connector with this multi-function, vehicle-end connector. Features 7-way outlet, 4-pole flat outlet and an integrated backup alarm.


This part has been a lifesaver, literally. I own a lifted 2007 F-150 that stands pretty tall and the backup alarm portion of this connector warns people or anyone around me of when I am backing up especially when they are in my blind spots. This connector in addition to the backup camera are a must when you own a lifted vehicle. One of the things a like the most is that it replaces my stock 7 and 4 way blades and looks very nice. Since it comes with a built in 4 way blade I have an additional 4 way because my stock wiring harness has one also. So I have two 4 way blades, one that I use for my trailer and a spare to use for whatever else I can think of.

Angel F.


This product continues to do its job and Im very pleased with it.


Quality product. Installed and operational in under 30 minutes. I can now power my truck camper and boat trailer from one location with a professional look. Highly recommend.

Howie A.


Works as well today is it did the day I installed it.Thank you for selling a quality product!


Installed the product on a 2015 Jeep Grand Cherokee that had a towing package installed after purchase of the vehicle. The product installed relatively easily after a couple of bolts, nuts and lock washers were found to mount the bracket to the designated trailer hitch mounting location.

In the run-up to this purchase the major problem was finding a connector with the right pin configuration that fits the one on the vehicle. This unit was the only one that provided a picture of the OEM connector or vehicle side connector's pin configuration. A big help to this type of problem would be to include a drawing of the connector instead of pictures, which could be found but are too dark or lacking in detail to be useful.


Very satisfied for the most part, it looks great but unsure if it works because I found out after hooking it up that it didn't work presumably because I have to take the jeep in to a service center to have the computer reflashed for the trailer lights to work since the jeep didn't come standard with the tow package. Not e-trailers fault. The only reason I didn't give a 5 star rating is I had to supply two small bolts and nuts for the bracket to bolt up to the hitch. The hitch bolted up great and I'm very satisfied with it. Thanks again and I will continue to purchase more from


When the Trailer Connector arrived the spring that holds the door closed was weak, George from e-trailer sent an e-mail checking to make sure the product was satisfactory, I informed George of the spring issue & he put me in contact with Nicole, she immediately sent a new one along with instructions on how to return the original connector. What Great Customer Service!! Can't go wrong being an e-trailer customer.


Well made product comes with all mounting hardware needed.
It will also be easy next time to replace my seven way hookup if it goes out.



Still working, I did modify mine with a switch run to my cab to cut off or on the backup alarm. Take note Curt this would not be that hard to put an option on these for this purpose


Got it on the day the tracking said i would. had to wait a couple days to install. took about 15 mins counting taking down the factory bracket and drilling and tapping it to accept the new piece and making a cutout like the bracket that came with it. cxould have used it but just decided to use the factory bracket. plug and play as they said. the back up alarm was an extra i really didn't have to have but it all works great. if i ever need any trailering accessories again etrailer will be my first call. not to mention it was about one fifth the cost of the factory replacement piece.


-Plug in and go--- Quick and easy installation. Works great. etrailer was great to deal with. I had a missing part in one of the boxes, due to careless shipping, and I E-mailed about the part and etrailer sent a new part right away. Thanks for great service.


One year old and made it through the Pittsburgh winter just fine. Keeps moisture and dirt out. Back up alarm works great, not overly loud but can hear it fine in back of van. Wiring was pretty straightforward and connected to the ford harness we ordered with the van.


Well designed device,Anticipate ,it will last as long as my truck. Functions as described .Will satisfy my requirements for shipping. Thank You

Davidb A.


Works great,not over loud,but effective safety device


It went right in factory bracket and looks great got it fast and loved the price


I was under the impression that this would be a "direct replacement" for existing receptacle. The wiring was, but the bracket from the manufacturer in NO way fit as a replacement for the existing bracket.
I'm a bit disappointed, but I got over it!
The back up horn would have been a great addition.
I may try and make a duplicate bracket, but.....


Got the product in just a few days after ordering. I installed it on a 2002 F-150 King Ranch crew cab pickup. Took longer to take the old, worn out factory installed one off than it did to put the new one on! Everything worked out just right. The only suggestion that I have is that the installation instructions should be more comprehensive. I'm pretty handy, so was able to figure it out quickly. A novice might have problems.


Product works very well, installation not difficult.

Kevin S.


Everything is great Laura, thank you for contacting me. There has been no issue with the items we ordered.


Works fine, but the back-alarm is very annoying - short, rapid & very weak sounding. Not acceptable, will keep unit but disconnect the alarm & replace w/a traditional warning alarm. Acceptable for a Prius or a mini-van, but not a 2500hd Duramax.


Fit perfectly. Took 5 minutes to install into the factory bumper holes. Plugged it in and functions like it was supposed to. The backup alarm is loud and noticeable. Would order anything from these folks and the item is quality.


Product is high quality and exactly as described. Installed and tested with no problem. Complete plug and play.


remarkable product for a great price , simple to install, compared to previous replacements it was like getting a backup alarm for free.


This is a great plug and play solution for towing and a backup beeper. While it's not that loud, it does the job and doesn't piss people off on the early morning routes.


Excellent product. Was installed in 15 minutes. Very well made and exactly what I was looking for. Service from etrailer is top notch.


received very fast. very good product. installed same hour I got it, I am very pleased, will order from etrailer again


This will not work on any of our vehicles. I will try to see if anyone around here wants it, if not I will be letting you know, and sending it back. Thank you. You responded quicker than I thought as I ordered it on the weekend and thought you would not get the order processed until Monday. Sorry.

Etrailer Expert

Mike L.


This particular connector is meant for use on vehicles equipped with a US car connector, such as Applications: 1999-2018 Chevrolet Silverado, 1999-2018 GMC Sierra and 1999-2012 Ford F-250, F-350, F-450 and F-550 trucks.


Easy to install. Received exactly what I ordered and what I wanted. Will definitely order from etrailer again.


Quality materials, love the versatility and the alarm ... alerts those that I CAN NOT SEE that I'm backing up ...


This product has worked as expected. I have no problems to report after 1 year of use.

Show More Reviews

See what our Experts say about this CURT Trailer Wiring

< Previous

Do you have a question about this Trailer Wiring?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Rachael H
Expert Research:
Rachael H
Employee Lindsey S
Written by:
Lindsey S
Employee Joshua S
Video by:
Joshua S
Employee Nicholas E
Test Fit:
Nicholas E
Employee Jacob T
Video Edited:
Jacob T
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Cole B
Installed by:
Cole B

At 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.

Product Experts Available Now!
Call 1-800-940-8924