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Ever wished trailer installations could be easier? With the T-One Vehicle Wiring Harness, forget about cut wires or tangled splicing. Simply locate the connection point behind your rear bumper and let the custom-fit T-One connector click right into your vehicle's OEM wiring harness. This no-fuss setup lets you safely power your trailer's signal lights using the built-in 7-way, blade-style connector.
No factory tow package? No problem. The Tekonsha 118276 can work seamlessly with models like the 2018, 2019, and even 2022 GMC Acadia, regardless of their factory tow packages. This harness makes universal connectivity a breeze, saving you from running extra wires and laborious installs. It assures coverage without needing prior setups for factory towing options.
Weather can wreak havoc on connectors, but with the 7-way setup, rugged 16-gauge bonded wires withstand the elements. Plus, a dab of dielectric grease can prevent corrosion, ensuring long-lasting durability even in challenging conditions.
Line by line instructions not cutting it? Fear not. Detailed installation videos walk you through connecting your Tekonsha harness trouble-free. It's like having an all-knowing guide in your pocket that shows you precisely where each component fits, making even the toughest installs straightforward and stress-free.
When it comes to towing, peace of mind is key. Users consistently report a fit as precise as factory equipment, with robust performance even under strenuous conditions. Tailored specifically for certain vehicle models, this harness shows up for both quick errands and long-haul adventures without skipping a beat.
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Average Customer Rating: 4.8 out of 5 stars (74 Customer Reviews)
Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom wiring harness. T-One connector plugs into OEM tow package wiring harness - no cutting, splicing or tapping required.
All the wiring was already in the vehicle. They first sold me the wrong harness. After inspection I called and returned it for full credit and received the correct one and installed it. Its works great and the dealer had no idea how to wire the car.
Product was received long before the scheduled delivery date. Their videos made installation a breeze. I did not have to lift my vehicle nor fully drop the exhaust for install. I did however have to use a step bit to make the access larger which was no big deal. Solid purchase.
Great product and informative people. Product reviews and installation videos were very helpful.The included installation instructions were very basic and could have been a bit more detailed but if you watch the videos, it all makes sense and it makes for a an easy installation.
I was the installer in this vehicle application. I can tell you apon doing so the instillation was straight forward. My friends vehicle and to this day he continues to pull his boat and trailer without issues. Great product and I am a retuning customer with several vehicle applications I have done. Thank you friend no worries.
Yes, the hitch and the wiring harness all worked out well. Needed a friend to install the hitch. Everything was included and bolted up with no problems. Wiring harness plugged in to factory wiring. Satisfied, would recommend to XT5 owners wanting to tow small to medium trailers. Thanks again, good product.
Service is top quality
Work well for my 2017 Arcadia which is a newly designed model. I was not sure if this item would be an exact "plug in" for my application considering my vehicle did not come with a factory trailer package. etrailer did some checking with the manufacturer to verify it would be and easy plug in. It did plug in and worked perfectly.
etrailer has excellent customer service personnel, who are knowledgeable, very friendly and polite. They have timely communications about your order, shipment and delivery.
The quality of the products that I have purchased from them has always been very good.
The instruction videos are thorough and will safe you many installation problems. I just installed a hidden trailer hitch on my 2020 GMC Acadia Denali without problems by using the video as my guide.
Watch video on removal of dust covers one of them is real tricky on Cadillac ZT5. My on concern about the hitch is the 7 way plug is round and the bracket is oval so they don't work together. All in all nice setup!
etrailer is my "go-to" source for anything related to towing, RVs or trailer building. Always fast shipping and great customer service.
Everything fit together perfectly. Make sure you order s mounting bracket for your connector. I forgot and wished I had at the time of ordering. Hardest part was removing the original dust covers off of car wiring harness.
Great service
Rather difficult to install. The "how to" video helped a lot. Had difficulty removing protective caps on wiring on vehicle.
Mike L.
4/20/2018
The linked install video shows the plugs being removed beginning at the 1:40 mark. If the dummy plug is hard to remove, it can be pried away gently with a small screwdriver.
Helpful Links
Thomas
4/19/2019
No problems with it.
This product was a perfect fit for my 2019 Acadia. The instructions and even video were spot on. I couldn't ask for a better experience. Etrailer has exceeded all my expectations as an online resource. I am a mechanic and business owner and I did not expect this kind of support with video instruction from an online retailer. I will continue to use and promote etrailer to all my friends, family, and customers.
Thanks etrailer for making my life easier.
5 Min. Installation, Plug & Play Removing Cadillac's connector cover was tough!!
Perfect fit for my 2018 Cadillac XT5 and easy to install
Built Well very easy to use, just plug and go.
These parts were a perfect fit for my 2018 GMC Acadia. Installation was easy with the etrailer.com install videos. Thanks!
Fast friendly service. Explained what I looking for and Justin layed out what I needed. Very reasonable pricing and shipping was updated regularly. Great customer service. I wouldn't hesitate to order again.
Product arrived quickly and in good condition. All necessary parts were included. The directions and video on installation were accurate and made the process easy.
Plug and Play
easy to connect to vehicle connectors
Like it it plugged right in used better zip ties easy to install
Very easy to install just wasnt a fan of not being able to put the two bumper/facia mounts back on
vary good
Dennis
1/24/2025
vary good
Jerred H.
1/25/2025
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Thomas
11/16/2023
Works great! dealer contractor wanted $850 to install a brake controller. E-trailer around $350