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Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat
(46 reviews)
Price: $37.63
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Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat
Part Number: C57101
In Stock
$37.63
Retail:$54.34
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CURT Custom Fit Vehicle Wiring - C57101
Highlights
- Tow With Any Trailer Plug: Dual 7-blade and 4-flat outlets let you hook up multiple trailer types.
- Plug-and-Play Install: Connects directly to the round U.S. Car Connector behind the factory 7-way.
- Built-In Backup Alert: Integrated alarm sounds automatically when you shift into reverse for safety.
- Simple Factory Replacement: Swaps directly with your OEM 7-way—no splicing or rewiring needed.
- Brake + Power Ready: Supports trailer brakes and 12V charge line through factory wiring.
Features to know about
Simple Upgrade for Dual Trailer Connections: 7-Way Blade and 4-Way Flat Plug
Swapping out an old or damaged trailer connector is quick with this Curt 7-way blade and 4-way flat plug. It replaces the existing factory 7-way and gives you both connection options in one plug. You get a 7-way for electric brakes and charge lines plus a 4-way for basic lighting. No adapters to juggle—just one clean setup that handles all your towing needs.
Plug-In Design for Easy Install: Uses the Factory Wiring Harness
This connector plugs straight into the factory U.S. Car Connector at the back of the existing 7-way. There’s no splicing or wiring guesswork. Just disconnect the old plug, snap this one into place, and mount it to the bracket. It’s built to match OEM connections, so the fit is right and all trailer functions work as they should.
Added Safety When Reversing: Built-In Backup Alarm
The integrated backup alarm automatically sounds when you put the vehicle in reverse, letting people nearby know you’re backing up. It’s built right into the connector housing, so there’s nothing extra to mount or wire separately. It activates only in reverse and works off the same circuit as your factory reverse lights.
Ready for Multiple Tow Setups: Works with OEM or Aftermarket Harnesses
Whether you’re replacing a factory socket or tying into an existing pigtail harness, this connector uses the standard round U.S. Car interface found on most trucks. It’s also compatible with common pigtail harnesses like # PK11998, so it can be adapted if your setup uses a different mounting location or custom wiring route.
Specs
Electrical and Connector Specifications
- Connector type: 7-Way Blade and 4-Way Flat
- Compatibility: Fits Ford and GM trucks with factory 7-way connectors
- Functionality: Provides both 7-way and 4-way trailer connections
- Additional feature: Integrated backup alarm
- Replacement type: Replaces existing OEM 7-way connector
- Compatible wiring harness: Uses standard round U.S. Car Connector
- Compatible accessory harness: Pigtail Wiring Harness # PK11998
Vehicle Compatibility
- Fits: 1999–2012 Chevy Silverado
- Fits: 2013 Silverado 1500 (requires alternate mounting location)
- Fits: 2014 Ford F-350
- Fits: 2009 Ford E-250
- Fits: 2012 GMC Sierra 2500
- Fits: 2013 Chevy Silverado 3500 (factory 7-way or U.S. Car Connector required)
- Fits: 2018 Jeep JL Wrangler Unlimited (with factory tow package)
- Fits: Ford E-350 models with 7-way using compatible connector
- Likely compatible with: 2000 Chevy C3500 cab and chassis (with OEM pigtail connection)
Installation Details
- Connection method: Plug-and-play to existing factory 7-way connector wiring
- Mounting: Installs into OEM or alternate bracket location depending on vehicle
- Hardwiring option: Available using Curt Trailer Connector Adapter # C57102 for vehicles without factory 7-way
- Backup alarm wiring: Integrated; can be disabled by severing alarm wiring if desired
- Power and brake control: Supports 12V power and trailer brake signals when wired accordingly
- Reverse light circuit: Uses center pin of 7-way connector
Note
Designed to connect only to vehicles with an existing factory 7-way connector; does not add trailer wiring where none exists. For vehicles without a 7-way, use an appropriate wiring harness or adapter such as Curt part # C57102.
57101 Curt Multi-Function Socket with Back Up Alarm - 7-Way RV Blade and 4-Way Flat - Ford, Chevy, GMC Trucks
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 Detailed Breakdown of the Curt Trailer Connector for Ford and GM Trucks
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:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
4.6
46 reviews
by:
Will P
09/01/2026
Very easy install. Fit perfect. Back up alarm is not loud and annoying.
by:
Angel F.
06/14/2017
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.
by:
David A.
12/17/2016
Well designed device,Anticipate ,it will last as long as my truck. Functions as described .Will satisfy my requirements for safety.fast shipping. Thank You
Davidb A.
12/17/2017
Works great,not over loud,but effective safety device
by:
Howie A.
09/03/2014
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.
9/9/2015
Works as well today is it did the day I installed it.Thank you for selling a quality product!
by:
Allen
08/09/2015
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.
by:
John
05/07/2018
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.
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.
by:
Kem
12/05/2019
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.
It will also be easy next time to replace my seven way hookup if it goes out.
Kem
12/6/2020
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
by:
Rocky L.
06/26/2016
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 etrailer.com
by:
Steven
06/10/2020
-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.
by:
Barry B.
12/30/2011
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.
by:
Gene S
09/14/2013
It went right in factory bracket and looks great got it fast and loved the price
by:
Edward
07/20/2021
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.
by:
Kevin S
01/17/2017
Product works very well, installation not difficult.
Kevin S.
1/23/2018
Everything is great Laura, thank you for contacting me. There has been no issue with the items we ordered.
by:
Patrick Mc
11/26/2013
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.....
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.....
by:
Keith P.
09/10/2017
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.
by:
Russell
11/15/2018
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.
by:
Henry
07/19/2024
Love it. Works really well. Would recommend to others interested. Great choice and fit right on my truck no problem. Thanks etrailer!!
by:
Ed
10/16/2024
This device is still working great. I clean this out occassionally and so the connections work good. Also, the back-up alarm is still functioning good as well. Great little item, I highly recommend it.
by:
Bob R
06/19/2014
Product is high quality and exactly as described. Installed and tested with no problem. Complete plug and play.
by:
Philip
09/06/2018
remarkable product for a great price , simple to install, compared to previous replacements it was like getting a backup alarm for free.
by:
Timothy
03/05/2020
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.
by:
Phil H.
05/12/2017
Excellent product. Was installed in 15 minutes. Very well made and exactly what I was looking for. Service from etrailer is top notch.
by:
Jason Zimmerman
10/09/2017
Exactly as described and quick shipping.
by:
Glenn Jr
03/13/2014
Fast shipping (as usual) !! Great value on products !! Highly recommended !!
by:
jimmy r
09/23/2016
received very fast. very good product. installed same hour I got it, I am very pleased, will order from etrailer again
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See what our Experts say about this CURT Custom Fit Vehicle Wiring
- How to Install the Curt Trailer Connector Part # C57101 on a 5th Wheel TrailerThe reverse light circuit is almost always on the center pin of a 7-way trailer connector which you can see from the attached photo. If your 5th wheel trailer has reverse lights then you can just tap into this but if not you would need to run a wire from the trailer side trailer connector all the way back to the end of the trailer. Please keep in mind that in order to install the Curt Trailer Connector part # C57101 you are first going to have to splice the Curt Universal Wiring Harness...
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- Recommended 4-Way and 7-Way Connectors for a 2023 Chevy TraverseI have both a 4-way and 7-way connector that are custom fit for your 2023 Chevy Traverse. They are the 4-Way Curt T-Connector Vehicle Wiring Harness item # C56394 and the 7-Way Curt T-Connector Vehicle Wiring Harness item # C56393. These custom-fit T-connectors plug into your Traverse's wiring harness, which is located above the muffler on the driver's side. I have linked a couple of installation videos for both below. Neither one of them have a back up alarm. The only option to purchase...
view full answer... - Troubleshooting Curt Trailer Connector Reverse Alarm Sounding With Brakes and TaillightsIt sounds like there is a problem inside the connector that plugs into the Curt Trailer Connector # C57101. I recommend using a Circuit Tester # PTW2991 on the 7-way plug and seeing if power is being sent to the reverse lug on the 7-way when you push the brakes or turn on the lights. Be sure to check the ground connections as well when you test the circuit. If you find that there is power going to the reverse circuit when there shouldn't you will want to remove the connector on the 7-way...
view full answer... - 7- and 4-Way Trailer Connector for a 2012 GMC Sierra 2500Yes, Curt 7- and 4-Way # C57101 will plug into the same harness as the factory 7-Way on your 2012 GMC Sierra 2500 (though it will not fit in the same place). For a 7- and 4-Way without backup alarm you could use # 30955 or # HM40975.
view full answer... - Install a Curt Trailer Connector Adapter with a Backup Alarm on 2000 Chevy C3500 Cab and ChassisIt is highly likely that there is an OEM pigtail wiring harness that you could plug the Curt # 57101 into on your 2000 C3500 Truck. The typical locations for this connection point are near the spare tire and also on the drivers side behind the rear tire on the frame rail. This connector will most likely have a dust cover on it and you should be able to remove the cover and the zip ties holding this to the frame and plug it directly into the connector on the rear of the Curt Trailer connector...
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- Universal Version of the Curt Trailer Connector # C57101The closest thing we have to a universal version of the Curt Trailer Connector # C57101 would be the Curt Trailer Connector Adapter # C57102. This adapter is designed to plug into a 4-way and then the other 4 wires would get run to where they belong. White to ground Blue to brake controller output Yellow to reverse light circuit Black to positive side of the battery
view full answer... - How to Know if the Curt Trailer Connector for Ford and GM Trucks - Backup Alarm Will Fit a VehicleIf your Ford E-350 has a 7-way on it currently that uses a harness that looks like what you see in the picture I attached the part # C57101 is going to work. Nearly all 7-way harnesses use this same style of connector so there is a good chance this would work.
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- Can the Backup Alarm be Disabled on Curt Trailer Connector for Ford and GM TrucksYou would have to sever the wiring that is going to the backup alarm part of Curt Trailer Connector # C57101. You should be able to access the back of it by removing the screws that hold the alarm in place.
view full answer... - How to Install a 7-way and 4-way at the end of a Torklift 48 Super TrussIn-bed wiring used for fifth wheel and gooseneck hitch should do the trick. What you would want is the Curt 5th Wheel/Gooseneck Wiring Harness 7-Pole # C56000. This will plug in line with the 7-way at the rear of your truck and then would allow you to extend a 7-way out on your Torklift 48 Super Truss # TLE1548. If you needed the 4-way as well you would need to swap the 7-way of the # C56000 with the # C57101. This does include a back up alarm that will activate when your vehicle is put...
view full answer... - Will the Curt 7 and 4-way part # C57101 fit on a 2010 Chevy SilveradoYes, the Curt Trailer Connector for Backup Alarm, 7-Way Blade and 4-Way Flat # C57101 will fit your 2010 Chevy Silverado as this product fits 1999-2012 Chevy Silverados. This product will replace your 7-way and will provide a 7-way and a 4-way.
view full answer... - Is Curt Trailer Connector with Backup Alarm Compatible with 2004 Jeep Grand CherokeeI have a solution for you. I recommend the Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat # C57101. This will plug right into your factory wiring and will give you that same style alarm you are seeking. The Curt Trailer Connector for Dodge Trucks - Backup Alarm - 7-Way RV Style and 4-Way Flat Item # C57100 is only compatible with certain Dodge vehicles.
view full answer... - Replacement 7-Way Trailer Connector for Curt Wiring Harness 56071Yes, you can get a replacement 7-Way receptacle only to fit in place of the one on # C56071. If you wanted a Curt brand you could use # C57101 which is a little fancier with its backup alarm and 4-Way flat built in. Or for something simpler, just a 7-Way, you could use # PK11893.
view full answer... - Will Curt Trailer Connector and Backup Alarm for Dodge Trucks Fit a 2002 Dodge DakotaCurt trailer connector # C57100 will fit your 2002 Dodge Dakota if the 7-Way trailer connector is a factory connector. There should be a rectangular plug that plugs into the back of the 7-Way if it is factory. I have included a picture of the back of # C57100 for you to compare. If the plug that plugs into the back of your 7-Way is round then you would use # C57101.
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- How to Install the Curt Trailer Connector for Ford and GM TrucksThe Curt Trailer Connector for Ford and GM Trucks item # C57101 connects to existing wiring for a vehicle that came with a 7-way connector from the factory. You would just need to go behind your vehicle's 7-way connector, disconnect the tabs, remove the old connector from the wiring harness, plug your vehicles wiring harness into the back of the Curt connector, and then install it to the mounting bracket. I have linked a video below that will show you all the steps I have explained. If...
view full answer... - Will Pigtail Wiring Harness for Pollak Replacement 7-Pole RV Socket Fit Curt 7-Way Trailer ConnectorYes, you can use Pigtail Wiring Harness # PK11998 with Curt Trailer Connector # C57101. Many 7-Way connectors now use this same harness whether they are OEM or aftermarket.
view full answer... - Will the Curt Trailer Connector # C57101 fit the Factory Harness of a 2012 F350Unless someone changed the wiring of the factory 7-way on your 2012 Ford F350 then it should be wired like the picture I attached. I think you might be referring to the release tab on the factory harness for your 7-way. Which if you check out the picture I attached you will see the back of the Curt Trailer Connector part # C57101 and you will see that the release tab attachment point is in the 1:00 position from the view of the picture, but if you were installing it in your harness it...
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- How Does Curt 7-Way Blade and 4-Way Flat Trailer Connector with Backup Alarm InstallThe Curt trailer connector, # C57101, replaces an existing 7-Way trailer connector on a Ford or GM that came with an OEM connector. It does not plug into an existing 7-Way. On the back of the 7-Way on some trucks there is a round plug. It is that plug that plugs into the back of this connector.
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view full answer... - Compatibility of Curt 7-Way and 4-Pole Trailer Connector # C57101 with 2013 Silverado 1500According to Curt, the # C57101 7-Way Blade and 4-Way Flat trailer connector you referenced is indeed compatible with your 2013 Silverado in that it would be compatible with the US car connector that's plugged into the existing 7-way. However, it will not fit through the cut-out in the bumper, and would need to be mounted in an alternate location.
view full answer... - Recommended Trailer Wiring For 2018 Jeep Wrangler Unlimited Rubicon With Factory PackageIf you the factory tow package with a 7-way you can replace the 7-way with the Curt Trailer Connector for Ford and GM Trucks - Backup Alarm part # C57101 which connects to the towing port on the 2018 Jeep JL Wrangler Unlimited as confirmed by Curt. If you do not have the port you will need Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # C56407 which plugs in behind the tail lights. This is only a 4-Way though to illuminate the trailer lights so I believe...
view full answer... - Will the the Hopkins Back Up Alarm Fit both a Ford 2009 F-150 as well as a Ford 2013 F-150I have checked with my contact at Hopkins, and it looks like both the 2009 and 2013 Ford F-150 use a 921 bulb. Hopkins does not currently have a back up alarm system that is compatible with this tail light bulb style. If you would like you could use the Curt # C57102 or the #C57101. These are replacment trailer connectors that have also have a back up alarm included. If your trucks currently have a factory installed 7-way you will want to use the # C57101 as a direct replacement. If not...
view full answer... - 7-Way, 4-Way and Backup Alarm Recommendation for 2017 Ram 1500For the style of round 7-way connector you'd have at the rear of your 2017 Ram 1500 you'd want the part # C57101 instead of the # C57100 that you mentioned.
view full answer... - Will the Curt Trailer Connector for Ford and GM Trucks With Backup Alarm Fit a 2014 Ford F-350I spoke with Curt about the Curt Trailer Connector for Ford and GM Trucks part # C57101 and was informed it would indeed work on a 2014 Ford F-350. The Curt Trailer Connector would be plug-n-play and you would have a fully functional backup alarm.
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Angel F.
6/14/2018
This product continues to do its job and Im very pleased with it.