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  1. Custom Fit Vehicle Wiring
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Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
CURT

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

Part Number: C56325
In Stock
$27.30
Retail:$46.91
You Save: 42%
Custom Fit Vehicle Wiring

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into OEM tow package wiring harness - no cutting, splicing or tapping required. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56325 or order online at etrailer.com. 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 (465)
  • Q & A (0)
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CURT Custom Fit Vehicle Wiring - C56325

  • 4 Flat
  • Factory Tow Package
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Plug-In
  • Plug and Lead
  • CURT
  • No Converter

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


Features:

  • 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
    • Locate connection point behind center of rear bumper
    • Plug in T-connector
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 7.5 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the center of your rear bumper.


Once installation is complete, the 4-way 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 plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.



56325 Curt T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Similar to Tekonsha TK74VR and Tekonsha 118720

Installation Details C56325 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.8

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

by:

Easy to install. Wish there was a defined location to tie off the strain relief for the trailer wire harness. Ended up zip tying to a wire loom and then looped it around the hitch to keep it from dragging.



by:
2021 Chevrolet Blazer

I just received the hitch and wiring plug have not had time to get it installed. It looks great and will look good on my wife’s suv. We are putting this hitch on her suv to haul our electric bikes we have a bike rack. I will make another post when I get the hitch installed I only gave it four stars because we don’t have it installed.



by:
2017 Cadillac XT5

The trailer hitch is beefy. I think when the vehicle is no more, that hitch will still survive! My son and I installed the hitch in our driveway. Getting the most forward bolts fished into the frame was difficult. Also, the bolts will try and retract up into the frame while you put the nuts on. The bolts can be held from the side with a flat blade screwdriver while nuts are threaded on, stopping them from retracting. In the end, all fit well.

There's a trick to removing the vehicle trailer electrical connector protective cap that's not well covered in the video. The red plastic retainer clip can be released by pushing on the red tab with the v slot that is visible from the cap side using a small flat
blade screwdriver.

Installers in my area wanted $140 - $150 to put the hitch on. This was too much for me, so I did it myself - even though I'm 71 with bad knees. My son's help made it possible.



by:

Awesome company the trailer hitch fits like a glove and hides behind bumper perfect and clean easy install.



by:

Fit right on my Envision below the bumber looks great. and wire harness went on no problem.

Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

6/17/2025

I agree with you, Raymond, it looks great! What are you going to be towing?

Ray profile picture

Ray

6/17/2025

@GwendolynY pulling a light trailer and my boat. Also have a carrier rack. To put things on to haul


by:

Perfect fit! I was able to install the hitch by myself, in my garage. Only a wrench and socket needed.



by:

Factory style. Plug and play.



by:
2023 GMC Acadia

Simple plug and play!



by:

Fantastic quality, great video support, installation was easy. Pricing was excellent



by:

well made, installation was per instruc tions



by:

Easy to install. The ground pin on the 4 pin connector fell off, it's not held on by much.



by:

Able to successfully get the harness installed and it works perfectly.
Was a bit more difficult than the video implied but we got it! The videos saved us!



by:
2023 Chevrolet Blazer

5 star on quality, 4 star on instructions. I’m pretty good with mechanical things. This was not difficult to install. The access holes provided were like 7/8” but bolt heads are 1-1/16” so needed to enlarge those holes using a 1/2” drill bit. Instructions said to disconnect muffler but I did not and was able to get it in place. Need to remove four screws, two on each side from center, on the bumper cover and pull back to install. Used jack stands to assist. Did not need to trim any of the cover. Fishing lines worked great too; just put a good kink in them to pass easy to the access hole. Did have to trim two bolts projecting from the bumper bracket and then it fit great, all bolts lined up. Adapter for lights was perfect also, bit hard to reach and disconnect cover though. Overall very happy with this product.



by:

The hitch has worked as expected. The big difference in products has always been more in the customer service, than the product quality itself. Your hitch is a perfect example. By providing all the necessary information, instructions, and specialty tools, you make this a top-notch product.



by:

Direct fit for a 2021 Chevy Blazer premiere installed a hitch, and this wiring harness at the same time. I figured since the bumper was off, I would be able to install this quick and easy and it was. Just had to take the dust and weather cover off existing plug that was behind the driver side, bumper and plug this wiring harness right in. As you can see from pictures pretty straightforward install.



by:
2017 Cadillac XT5

Easy to install.



by:
2017 Cadillac XT5

Great fit. Easy to install. Everthing i needed was included.



by:
2023 GMC Acadia

Great and fit my GMC Acadia 2023



by:
2024 Buick Envision

Installation was super easy. Instead of removing the torx screws to loosen the plastic bumper, I took out one bold that held the driver's side heat shield in and just moved that out of the way to get to the connector.



by:

I was very pleasantly surprised by the ease of this wiring harness installation. I installed a wiring harness on a Jeep a few months ago. This was literally plug and play.

Chantry profile picture

Chantry

12/23/2024

I have had no issues with this harness. Every time I plug in a trailer it works just like Id expect.



by:

Fit perfectly on my Cadillac XT5 and an easy install .



by:
2018 Cadillac XT5

it installed quickly as advertised, fit as it should, totally satisfied.



by:

Great customer service! Had trouble with shipper but not etrailer!



by:

Easy peasy

James profile picture

James

10/14/2025

Still working fine



by:

Easy install; less than 30 minutes


25
466
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Info for this part was:

Employee Lindsey S
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