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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # C56245
Our Price: $32.67
You Save: 40%
Custom Fit Vehicle Wiring

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56245 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (209)
  • Q & A (0)
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  • Why etrailer?

CURT Custom Fit Vehicle Wiring - C56245

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required.


  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Insert fuses and relays (included) in engine compartment
    • Locate connection point in passenger's-side rear wheel well
    • Plug in connector
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 5.0 amps per circuit
    • Tail lights: 5.0 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's factory tow package wiring harness, which is located behind the rear, passenger's-side wheel well trim panel.

Torx Screw Locations

You will have to locate and remove the (5) T-20 Torx screws with a T-20 Torx bit (not included) and pull back on the wheel well trim panel. It might be easier to access this connection if you remove the additional Torx screw holding the harness in place.

Wiring Harness Location

Once you've located the wiring harness, remove the protective cover and plug in the connector.

Fuse and Relay Locations

Once you've plugged in the connector, insert the included fuses and relays into their locations in the fuse box, which is located in the engine compartment.

Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.

It is recommended that you use a small amount of grease on all electrical connections - the plug on your automobile and the 4-pole connector itself - to help prevent corrosion.

56245 CURT T-Connector - OE Replacement 4-Flat

Replaces Curt C56202

Installation Details C56245 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - C56245

Average Customer Rating:  4.8 out of 5 stars   (209 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required.


This connector worked great! Make sure you really press the factory end together with the harness it takes quite a bit of pressure to make the connection.

2017 Chevrolet Traverse

Good instructions, complete package installed with no problem. The only issue was locating the battery negative lead cable which was on the floorboard behind the passenger seat. I had to do a Google search to find that information.


Easy hook up, the hardest part was getting your hand up in the rear wheel liner to plug into the harness, but wasn't too bad. Everything else was a piece of cake, plug and play.....

Nissan Xterra

Works great. You can't see it at all when not using. I pulled my old Nissan Xterra up to Indianapolis, Indiana from Lake Charles,Louisiana with no problems. Actually just used it today to pull my small 13' tilt bed trailer to go pick up a portable generator I bought.

2016 Chevrolet Traverse

Great product made specifically for the Chevy Traverse. Contains everything necessary for the electrical wireing except zipties and wire shield tubing. I tried many of the "OEM" harnesses from Autozone, O'Reilly's and Napa but they did not have the correct plug housing to match the factory plug up in the fender.
Wish I would have found this to start with or that a full package option with a hitch reciever was offered!

2014 Buick Enclave

Very easy plug and play. 2014 Buick Enclave AWD


E trailer products are always great


Fast easy installation process. Product came quickly in the mail.
Thank you!

2017 GMC Acadia Limited

Super easy install on a GMC Acadia! Plugged in and tied it to the hitch, done.


Worked very well on my car

2015 Buick Enclave

Installed the 75528 hitch and C56202 harness for my 2015 Buick Enclave over the weekend. The install was simple and the you tube videos were a big help. There could have been a little extra length on the wire harness, but overall plugged right into my existing connectors. The hitch is hidden and is clean after reinstalling the back cover. Overall very satisfied.

I havent used it much, but no issues so far.
Clay H - 07/05/2017


I found the entire process to install the trailer hitch and wiring was made easy by trailer videos.


Needed this kit for the hitch I purchased. came as expected. I decided in the end not to put it on as it is in the high 90's here in Florida. Just didn't feel like crawling under the truck. However I did talk to the mechanic shop that installed it for me and they said it is one of the easier after market hitches and wiring kits they ever installed. Also etrailer was great to deal with as well.

No issues
Joey D - 01/06/2018


The folks at etrailer are awesome! Installation was simple and straight forward with the help of the online videos. Couldn't be happier with my experience. I highly recommend and will purchase from here again!!


Excellent product. Access to the vehicle connection was tight but with a little extra leverage was able to mate the connections. Owners manual and fuse/breaker cover diagram aided in the installation of the fuses and breakers. Works GREAT.

Still working great with no issues. Great product.
Rod W - 12/09/2015

2016 Buick Enclave

The trailer hitch was easy to install, no problems. I had the trailer lighting hookup installed and it works great. Your products are great!

Product performs well!
John B - 06/06/2018

2015 Chevrolet Traverse

Super! On the Traverse, the factory provides all trailer wiring at a connector in the right rear fenderwell. This harness easily plugs right into that connector, and is just the perfect length to bring the plug out to the hitch. I used the TrailerMate TM76470 mounting bracket on my Hidden Hitch 87435 receiver. The length of the wire harness is perfect -- reaches just right, without a bunch of extra wire to deal with. The harness includes relays and fuses to add to the factory fuse panel to utilize the factory harness. The instructions are incorrect as to where the battery of the Traverse is (under the floor behind front passengers' seat), and also where the factory connector is (right rear fenderwell), and the diagram for the placement of fuses and relays requires some studying (look in the lid of the factory fuse box - everything is labeled). You DO NOT have to remove the fenderwell to get to the connector -- reaching up there from below is easy. Look at eTrailer's help videos online -- this really is an easy product to install -- with no tools!

2015 Chevrolet Traverse

Fast delivery my order was complete I will not hesitate to order again if I need any additional parts.

2014 Buick Enclave

Product installed by U-Haul, and worked fine for about 7-8 months. After that all lights on my 2014 Buick Enclave no longer functioned. No brake, turn signals, or tail lights worked. Buick dealer nor U-haul would not work on the issue, and had to completely remove the product to get the lights working again.
DO NOT buy this product.

2014 GMC Acadia

The Curt 56245 worked on our 2014 GMC Acadia without tow package. It allowed us to use the built-in factory installed wiring to power the tail and brake/turn lights. I like that a lot better than using a 2-wire harness that plugs into the vehicle lights and having to run and hookup a hot wire to the battery.

Installation was easy once I found good instructions. It is very easy to install.

Be aware, according to the Curt instructions the connector is on the drivers side, but it's actually on the passenger side. They also say that you have to remove the fender well, but that's not required. Due to these discrepancies I gave it 4 stars. The Tow Ready 118270 has much better instructions and I would have purchased it for that reason, if I had known it was available at the time.

There are a couple of things to be aware of when installing the harness (These would apply to either the Curt or the Tow Ready harnesses.).

First, the factory connector end is attached to the body and ours was turned sideways. It's relatively easy to turn it straight down so that you can plug the 8-pin connector into it.

Second, the space is tight, but I have large arms and was able to fit my hand and arm in the space near the wheel and maneuver the connectors.

Third, the connectors fit together tightly and I didn't get them completely seated together the first try, therefore the lights didn't work and I had to go back and completely seat them together. When seated correctly you should hear a little click and the back of the new connector retainer should be even with the end of the factory connector.

I routed the harness cable over the bumper bracket so it's out of the way of any hot and sharp parts. I also routed it above the square hitch tube instead of behind it due to the slight possibility of it getting damaged if the ball mount was inserted into the receiver too far or when removing the spare tire.

One more note; The ty-wraps (wire ties) that come with the harness are too short to go around the tube of the hitch. Just something to be aware of. I always have plenty of different sized ties so it wasn't a problem for me.


Perfect fit.


This vehicle wiring harness worked as advertised and was both easy to install and connect. Since installation, I have had no issues with the wiring as the included tie wraps have proved effective. The biggest challenge I experienced during installation was getting to my car's connector. Once accessed, installation went smoothly.


I ordered the Draw Tite Max Frame trailer hitch, dielectric contact grease, Curt T-Connector Wiring Harness and the Curt Class 3 ball mount with 2" ball. Everything arrived in a VERY timely fashion and in excellent condition. The install went exactly as described in the HELPFUL videos that are posted on the website. Very happy with the product so far. Just waiting for the opportunity to actually haul my trailer. : )


Excellent hitch and cable. Used the video to make the installation easy. etrailer had the best price and support of any of the companies I searched. Thanks!

The hitch and wiring are great. No problems at all. Easy video installation and printed materials. I will come back if I need anything.
Kris M - 10/18/2018

GMC Acadia

I purchased a Curt trailer hitch and s wiring harness for our GMC Acadia. Everything fit perfectly. Easy to install. I am very glad i chose etrailer ... great prices too. Everything shipped and was delivered quickly.

Show More Reviews

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

  • Curt Trailer Wiring Harness Fit for a 2016 GMC Acadia
    I checked with Curt and the trailer wiring harness part # C56245 is confirmed as a fit for your 2016 GMC Acadia. This is the correct kit for if you have the tow package.
    view full answer...
  • Trailer Wiring Harness for a 2014 GMC Acadia SLT2 without Factory Tow Package
    I checked with Curt and they do list trailer wiring harness # C56245 as a fit for all models of the 2014 GMC Acadia so that would include yours without the factory tow package too. I have included a link to the installation instructions to the right for you.
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  • Height Above Ground of Draw-Tite Max-Frame Trailer Hitch # 75528 on 2013 Buick Enclave
    I have linked a video showing installation of Draw-Tite Max-Frame Trailer Hitch # 75528 on a 2010 Enclave; at the 3:30 mark there is a display of the receiver tube's height above ground when installed. On this vehicle the top of the receiver tube will be approximately 17-3/4-inches above ground. The exact height will depend on the tire's tread depth and the cargo and passenger load in the vehicle. If you need a 4-pole trailer wiring harness you can use # C56245 from Curt.
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  • Hitch Receiver and Wiring Recommendation for 2015 Buick Enclave
    I spoke with my contact at Curt and the Custom Fit Trailer Hitch Receiver, #13424, fits the 2014, as well as the 2015 Buick Enclave. The wiring harness that you will need for your Enclave is the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, # C56245.
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  • Number of Relays in Wiring Harness for 2017 Chevy Traverse Without Factory Connector
    You will actually install just two relays with the 4-flat wiring harnesses that fit your 2017 Chevy Traverse without the factory trailer connector. The Curt simply has an extra, but both will have two relays installed, at the same position on your Traverse, R15 and R16, as you can see by the cut out of the linked installation instructions I added for each: - Tekonsha T-One Vehicle Wiring Harness # 118270 - Curt T-Connector Vehicle Wiring Harness # C56245 I have added links to video installs...
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  • Is There A Reason The Curt T-Connector Harness Comes With More Relays Than The T-One Harness
    I have taken a look at both instruction manuals, the T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector, part # 118271, and the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector, part # C56245. Each of these wiring harnesses use only two relays during their installation. The Curt wiring harness includes an extra relay and both harnesses include an extra 30A fuse. I have included installation videos of both wiring...
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  • Does Factory Rear Air Conditioning on a 2017 Chevy Traverse Affect Trailer Wiring Harness # C56245
    Having factory rear air conditioning on your 2017 Chevy Traverse would not affect the fit or function of Curt wiring harness # C56245. It does, however, affect # C56181 or any other harness that plugs in line with the vehicle tail light wiring. From what I understand the AC components are in the way making it difficult to install a harness that plugs in line with the tail light wiring. But if you managed to gain access it will work. So something else is happening. When you say that the...
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  • Trailer Wiring Harness for a 2015 GMC Acadia
    By law your trailer has to have functioning lights. It would not be a problem if you were moving the boat and trailer around on your own property but out on the road you have to have lights. To add a 4-Way trailer connector to your 2015 GMC Acadia you can use # 119250KIT.
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  • Trailer Hitch and Wiring Recommendation for a 2014 GMC Acadia
    First let's start with a hitch for your 2014 GMC Acadia. For that you will want the Draw-Tite part # 75528. There are no hitch options for your vehicle that will allow it to keep the rear fascia, but realistically that shouldn't be a problem since it's main purpose is only for appearance purposes. I attached an install video for you to check out as well. Since you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with...
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  • Hitch Recommendation for a 2015 Buick Enclave
    The hitch you would want for your 2015 Buick Enclave is the Curt Hitch part # 13424. I attached an install video for you to check out as well. For trailer wiring you would want the part # C56245. For ball mounts I recommend the etrailer Ball Mount Kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a carrying bag.
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  • 2016 Buick Enclave Draw Tite Hitch Fit Confirmation
    For your 2016 Buick Enclave the Draw Tite hitch part # 75528 has been confirmed as a fit. Since trailer hitch hardware is considered one time use you would need to replace all of the hardware. We offer replacement hardware. For that you would want the part # RHK. On the product page you would need enter the part number of the hitch and select the manufacturer from the drop down menu. The hardware kit will come with new handle nuts as well. If you need trailer wiring you would want the...
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  • Mounting Bracket Needed to Mount 4-Way Flat Connector on Hitch for 2017 GMC Acadia Limited
    To mount the plug from a 4-Pin Flat wiring kit, like part # C56245, on the Draw-Tite Max-Frame Trailer Hitch Receiver # 75528 for your 2017 GMC Acadia Limited you will just need the Mounting Bracket part # 18144. This comes with the mounting hardware.
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  • How To Install a 4-Way Trailer Connector on a 2016 Buick Enclave
    If you have a 2016 Buick Enclave then there should be a tow plug that will allow you to connect a 4-way trailer connector without having to tie in behind the taillights or splice into any wires. This plug should be present whether or not you have the factory tow package however, if you don't have the factory tow package then you will need to install the fuses and relays that come with the kit. I recommend the Curt T-Connector Vehicle Wiring Harness part # C56245. If you take a look at...
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  • Fascia Re-Installation After Installing Draw-Tite 75528 on 2013 Buick Enclave
    We offer two brands of 2-inch Class III trailer hitch for your 2013 Buick Enclave and both will install in the same spot on the vehicle's frame. Both hitches can be seen on the link provided; both share the same installation note that the fascia door panel must be removed for hitch installation and possibly cannot be reattached. We do not offer any hitch that avoids this potential requirement. You may be able to trim this panel satisfactorily in order to re-install it. Of the three hitches...
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  • Trailer Hitch and Trailer Wiring Harness Recommendation for 2015 GMC Acadia Without tow Package
    The Tow Ready # 118270 will work on your Acadia even if you don't have the tow package. The wiring harness includes the fuses and relays needed to activate the tow package wiring. I've confirmed this with Tow Ready. If you needed a 7-way connector, use # 118271. For a hitch, I'd recommend the Draw-Tite Class III trailer hitch, part # 75528. I've linked you to some installation videos. I hope you'll find them helpful.
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  • Brake Controller Recommendation and Install for a 2013 GMC Acadia
    You will need to start with a 4-way (if you do not have one). For that you would want the # C56245. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install video for this product as well. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake...
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  • Hitch Receiver and Wiring Harness for Electric Chair Lift on a 2017 Chevy Traverse
    I would be happy to help you find a hitch and wiring harness for your 2017 Chevy Traverse. For your hitch I recommend the etrailer Trailer Hitch Receiver item # e98863. This is a custom fit hitch that bolts directly to your Traverse's frame with included hardware. I have linked an installation video so you can see the process and what the final product will look like once installed. For your wiring harness you will want the Tekonsha T-One Vehicle Wiring Harness for Factory Tow Package...
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  • Can Door In Fascia of 2013 Buick Enclave Be Replaced After Trailer Hitch is Installed
    Although it wasn't possible with 2012 and earlier models, the 2013 and later Buick Enclave models allow the rear fascia door to be replaced after the Draw-Tite Class III hitch, part # 75528 has been installed. You can see this in the video I've linked for you. If you plan on towing a trailer, you'll need a few other items to complete your towing system: Trailer wiring harness, part # C56245 Ball mount, part # 2923 1-7/8 inch trailer ball, part # 19260 or for a 2 inch ball, use part # 63845
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  • Will Curt T-Connector Wiring Harness # C56245 Work with Hopkins Fold-Over Mounting Bracket
    I went out to the warehouse so I could physically test the fit of the 4-Way on the Curt T-Connector Wiring Harness # C56245 and the Hopkins Fold-Over Mounting Bracket # HM48595. I found that the 4-Way connector, along with the dust cap, were just a bit too large to allow the folding bracket to securely close around the unit. This particular bracket will not be the best mounting option for this harness. I instead recommend looking at the Tow Ready Mounting Bracket # 18144. You can use...
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  • Does Wiring Connector Exist on 2017 Chevy Traverse Even Without Tow Package
    Yes, the connector to install the Curt T-Connector Vehicle Wiring Harness # C56245 will still be located on your 2017 Chevy Traverse even if you don't have the factory tow package. Basically if you had the factory tow package it would already have that connector PLUS it would already have all of the fuses and relays needed to provide power to your trailer light functions. In addition to the T-Connector I also recommend using mounting brackets # 18144 and # 18140 to keep the 4-Way next...
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  • Best Hidden Hitch And Wiring For 2014 GMC Acadia
    Our etrailer Trailer Hitch Receiver # e98863 hides behind the plastic cover and is a fairly easy install! I'll include a video to show you how you can install it yourself. The wiring will be just as easy if not easier! Since you do not have the factory tow package, you'll need the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector Item # C56245 . This kit includes the fuses and replays to activate your tow package along with all the wiring you'll...
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  • Trailer Brake Controller Recommendation for 2014 GMC Acadia SLT with Factory 7-Way Tow Package
    Among the most popular and reliable trailer brake controllers we offer is the Tekonsha Prodigy P3, part # 90195. This proportional controller works with both electric and electric-over-hydraulic brakes and will ensure your trailer will stop in proportion to the tow vehicle, which saves wear and tear on the brakes of both vehicle and trailer. If your Acadia has a factory tow package with 7-way trailer socket at the rear bumper you'll need to order just the controller itself and the matching...
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  • Trailer Wiring Harness Kit Options for 2011 Chevrolet Traverse
    Curt 4-Pole trailer wiring harness kit # C56245 fits the Chevrolet Traverse for model years 2013 through 2017. For your 2011 Traverse we do offer similar plug-and-play wiring kits and the correct one will depend on how the car is equipped. If you have the factory tow package the car will have a round U.S. Car connector under the rear bumper that will accept a 4-pole plug-in harness # 118384 or a combination 7-way/4-pole harness like # HM40975. If the car does NOT have the factory tow...
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