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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 existing wiring - no cutting, splicing or tapping required.
Features:
Installation
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your rear cargo area.
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.
California residents: click here
The trailer hitch gets five stars. Unfortunately the vehicle wiring harness only gets three. It needs a safety feature such as a fuse or something so that it doesn't allow the BCM to blow which is what happened on my van. Ultimately the wiring problem was the trailer but when the BCM goes it's expensive.
Like all curt products it just worked… never any fitment or issues of any kind. Shop here all the time awesome selection prices and customer service/ support always top notch!
I brought my 2019 Chevy Express 15 passenger to you to determine the parts I needed for towing. Your technician inspected the vehicle and determined it didn't have the factory tow package even though it had a trailering button by inspecting the area around the spare for a harness. However, I believe I just found the factory harness near the bumper. Please confirm per the picture and advise how to recover.
i INSTALLED THE HITCH MYSELF IN ABOUT 45 MINUTES. tHE WIRING HARNESS WAS ALSO A BREEZE TO INSTALL. GREAT PRODUCTS.
The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector from eTrailer.com was exactly what I needed! The installation was quick and easy, the fit was accurate, and the value was unbeatable. Thank you for helping me upgrade my cargo van with both the trailer hitch and the wiring harness—now I’m ready to keep rolling with confidence!
Even easier to install myself than their directions say. Solid build on all parts. Will absolutely use and recommend eTrailer again and again and again!
The Curt trailer wiring harness for the 2021 GMC Savana 2500 van was perfect! It installed extremely easily, allowed me to interconnect the trailer braking system with just a couple additional wires, and worked like a charm first time! Extremely satisfied.

Gwendolyn Y.
3/21/2025
I love to hear how how smooth the install went! What are you towing?
Great product, easy install, even for people who don't have mechanical skills or a wide array of tools. I would 10/10 recommend to a friend.
I got the same curt T connection again because it's so easy to use and also the bumper mount hitch .again I say it's so easy to install, i did it in less than a hour ,Love it when I use it for my Cargo trailer. Thanks E.trailier.com for your support. Also EZ cargo rails and for quick access to tie downs. Thanks Dana for the Ordering.
Parts Arrived Fast and Fit Perfectly As Described, Easy Installation.
I purchased this over the other brand because according to the reviews I've read this came with a longer 4 pin wire. I routed through the brake light paneling to get a clean look and had plenty of wire to reach my 7 pin connector. No pigtail coming out of my rear doors. This was installed in a 2017 Chevy Express 2500 passenger van.
Easy to order
Shipped fast
Easy to install. 20 minutes and done.
Easiest I’ve ever installed, and I’ve done a few.
Wiring kit connects inside the van and yet, it appears I have some wires from the factory right down by the hitch. I may test them before I use the wiring kit.
Installation on 2009 Chevy Express Van - the installation of this harness couldn't have been easier (especially when you pair it with etrailer's instructional video). The only error I made was on the driver side where there are two connections that will work with this harness. BE SURE TO USE THE UPPER CONNECTION (see attached picture).
Very easy install and had no problems with quality or anything else with this purchase, including the price which was VERY FAIR!
Plug n play as advertised! Connecting this harness couldn't be easier! Clear simple instructions do help, but it's pretty straightforward!
Looks good only got the four pin installed so far everything delivered quick thanks
as described, fit just right
Easy to install plug and play A+++
Prompt delivery
good job curt & etrailer
Plugged into existing connector and had enough wire for everything to reach. The connector side with the yellow wire went to the drivers side of my van, it didn’t specify but everything worked well
Such a slick wiring harness. And great price.
I buy and install products from etrailer over (another site) because they filter their products. This was a professional job for a client. I don’t want crap showing up at the door. I don’t want to worry about the quality. Super appreciate etrailer for keeping my projects flowing smoothly
Not installed yet, but looks like what I ordered. Thanks
Nice products and fairly fast shipping.
Got last night, installed the harness this morning installed just like the video, perfect.2023 Chevy express van. Thank you so much
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Nick S.
10/13/2025
Hey Brian, I am not sure what that harness or plug is but it does not look like the factory tow package. For that vehicle the factory tow package harness would have been a 7 way round plug either on the bumper or behind it. This Curt harness is what you will want to install using the plugs behind the tail lights.