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  1. Custom Fit Vehicle Wiring
  2. Chevrolet
  3. Silverado 1500
  4. 2018
  5. Tekonsha
FITS 2018 Chevrolet Silverado 1500
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Retail:$50.54
Our Price: $36.98
You Save: 27%
Custom Fit Vehicle Wiring
Confirmed to Fit
2018 Chevrolet Silverado 1500

with factory 7-Way

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Tekonsha Custom Fit Vehicle Wiring - 118384
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The best technical support and full custom fit vehicle wiring installation instructions. Great price Silverado 1500 custom fit vehicle wiring and expert service. Chevrolet Silverado 1500, 2018 custom fit vehicle wiring by Tekonsha are available from etrailer.com. For expert service call 1-800-940-8924 to order your T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part number 118384, or order online at etrailer.com.
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  • Reviews (449)
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2018 Chevrolet Silverado 1500 - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Quickly and easily install a 4-way trailer connector on your Chevrolet Colorado. This T-One typically plugs directly into the back of your factory-installed 7-way connector so you can retain the 7-way and also pull a trailer that has a 4-pole flat.


Features:

  • Provides a 4-way flat trailer connector at the back of your Chevrolet Silverado 1500 to power your trailer's signal lights
    • Retains functionality of factory-installed 7-way, RV-style connector (if present)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind rear bumper
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your Chevrolet Silverado 1500's wiring harness, which is located behind the rear bumper. If you have a factory-installed 7-way, blade-style connector, the T-One will plug in between the 7-way and the OEM socket.


Once installation is complete, the 4-way flat connector will be stowed beneath your Chevrolet Silverado 1500, 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.



118384 Tow Ready T-1 T-Connector - 4 Wire

Item # 118384

Installation Details 118384 Installation instructions

California residents: click here


Customer Satisfaction Score:


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118384

Average Customer Rating:  4.8 out of 5 stars   (449 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle. This T-One typically plugs directly into the back of your factory-installed 7-way connector so you can retain the 7-way and also pull a trailer that has a 4-pole flat.

by:

The adapter fit perfect was easy as 123 to hook up. I'm glad I didn't cut into wires to install the LED light bar. Unplug the 7 pin plug and plug in the adapter.



by:
2011 Chevrolet Silverado

I used this harness to add a tailgate strip light to my 3011 Silverado. The whole process including installing the light strip took 45 minutes. The harness plugged in in minutes and works beautifully.



by:
2013 GMC Sierra

Have been looking for a T-connector for my trailer lights for two years. Truck has a seven pin connector built-in. Wanted my GMC emblem to light up when the breaks are applied. Was getting ready to cut and splice wires when I looked on the internet and learned about etrailer.com. Found the T-connector I needed. Took 5 days to arrive after ordering, and 5 minutes to install. Works great !



by:

Just what I needed .... perfect fit!!

Charlie N.

5/6/2024

Still working great ... use it everyday!



by:
2012 Toyota Tundra

I have a 2012 Toyota Tundra and I recently bought a pre-owned Leer camper shell. I used this harness to wire up the third brake light. I also used the brake light module. This setup worked perfectly and resulted in a neat and clean professional installation. Thanks etrailer, you had everything I needed for a successful prefect installation.

Ron G.

7/13/2023

I installed this unit on my truck one year ago. It was perfect then and it is still working perfectly without issue.



by:
GMC Sierra

Perfect fit for 2022 Sierra GMC . This leaves your 4 pin vacant to plug in your boat trailer etc



by:

Slow start to a good impression but everything worked out.
1. It started with a delivery delay; I live two hours from the manufacturer but it took 3 weeks to get me my harness. When the error was found they over-nighted the harness to me.
2. The wiring in the harness was loose and would lose connection, disabling the lights. Pushing a connector back in to place, crimping it down and wrapping it in electrical tape solved that issue.
That was a month into owning the harness. It's been a year now and I've had no problems. I'm pleased with the compatibility and ease of which it took to install.

Don M.

5/11/2023

The harness has held up great. Needed no adjustments after original installation.



by:

Exactly as described, wires in nicely, has been working flawlessly since the installation!



by:
2016 Jeep Grand Cherokee

Purchased this hitch for my new 2016 Jeep Grand Cherokee Laredo online after being quoted a $700 installation price at my local Chrysler Dealership. After doing some online searching and reading multiple reviews I decided to give these folks a try. My husband and I watched a very detailed video explaining 3 different hitch options for my Jeep and quickly decided for the price it was worth giving it a try. From opening box to install was less than 20 minutes that included connecting trailer light kit that I purchased extra $$.$$. You can barely see it under my JEEP. I'm very pleased and can't hardly wait to use it. Thanks again etrailer.com you helped me prove my to my husband that it would work and saved me $600!



by:

Search hi and low to find what I needed or even for someone who even understood what I needed. I had no luck until I search on etrailer.com. They had exactly what I was looking for. Ordering was simple and delivery was quick. They even check in with me before durning and after shipping. I love this site. I'll definitely shop here first next time.



by:
2016 Jeep Grand Cherokee

I purchased a trailer hitch (C13182) and wiring adaptor (T-One 118384) for my 2016 Grand Cherokee. Received it within a few days and fit was perfect! Only took all of ten minutes to install with the help of my 5 year old. Thank You!



by:
2024 Ram 2500

Perfect fit.



by:
2014 Jeep Grand Cherokee

Bought a trailer hitch, and wiring harness for my 2014 Jeep Grand Cherokee. etrailer was fantastic, right on the money with the videos and it was very helpful in choosing the right hitch. Very easy to install.



by:

Website very easy to operate and fubd exactly the right part to fit my truck/trailer !!! Videos were very helpful even telling me what sockets and wrenches I needed to complete install by myself and Im a carpenter not really mechanically gifted. Will definitely use etrailer.com again without hesitation!!



by:
2014 Jeep Grand Cherokee

Fit just like it should, engages securely and performs correctly. Nothing else I can ask for



by:

TRAILER WIRING HARNESS WENT TOGETHER REAL GOOD. IT ONLY TOOK A VERY LITTLE TIME TO INSTALL. THIS MADE INSTALLING MY LED BRAKE LIGHT KIT VERY EASY.



by:

World class customer service



by:

great trailer hitch at fair price.



by:

Always worked for me when purchased in the past so I didn't expect anything less this time.

Reginald W.

8/20/2023

Ive had no problem with this item even thru a harsh winter use. Just make sure you use a little diox grease on the electrical pins so moisture doesnt ruin the contact

Etrailer Expert

Mike L.

9/13/2023

@ReginaldW Good advice, dielectric grease like # 11755 does a great job of keeping moisture out of your electrical connections.


by:

Excellent product and easy to install! Finished up the installation with products 118144 and 118140 for a clean looking install.



by:

Installed myself in about 30 minutes. 06 Silverado crew cab. Fit right up to factory fitting that was hidden up on top of the spare tire.



by:

Fit perfectly, and the [online] video was very helpful



by:

Works perfectly



by:

Easy to use web site - got the correct part - I have already ordered more parts - this time for my trailer!!! I will always choose etrailer for my parts

Frank

1/30/2023

It was so easy to install and I have not had any issues with it. Best add on I ever added!!!



by:
2015 Jeep Grand Cherokee

Super easy installation and the addition of the 7 pin means that it is upgradeable. Perfect for me.


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449
Show More Reviews

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

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    I do have an option for you but there are no custom plug-in harnesses for a 2021 GMC Sierra 1500 at this time. That said, you can still install the Putco Red Blade LED Tailgate Light Bar part # P92010-60 without splicing and retaining the trailer connector by using the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118384.
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  • Troubleshooting Running Lights and Left Brake Blinker Not Working on Trailer
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  • Will TowReady 4-Pole Trailer Adapter for Trucks w/ Factory 7 Way, Part # 118384, Work on 2010 F-150
    The TowReady 4-Pole Trailer Adapter for Trucks w/ Factory 7 Way, Part # 118384, is an adapter that is designed to provide a 4-pole trailer connector on vehicles that have a factory 7-way. This Y-shape harness plugs into the existing 7-way and provides both a 7-way connector and a 4-way. This enables you to add the 4-way connector without losing the 7-way, giving your F-150 the ability to tow trailers with either type of connector. If your 2010 F-150 has the factory tow package (but no...
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  • Adding 4-Way Flat to 2000 Chevy Silverado with Factory 7-Way
    Since your 2000 Chevy Silverado is equipped with the factory 7-Way connector all you will need to add a 4-Way is the Tekonsha T-One Wiring Harness # 118384. This will plug right in-line with the 7-Way (no splicing, cutting, etc) to provide you with a 4-Way flat that you can use for your new light bar. Because of how it installs it will also retain function of the existing 7-Way. I have attached an installation video that you can use for reference as well.
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    I check the owner's manual of your 2020 Ram 1500 and the fuse for the 12v power pin on your 2020 Ram 1500 is located in the fuse box underneath the instrument panel on the driver side, and the fuse is F01 which is a 30amp pink fuse. Check to make sure the fuse is not blown/missing, as this is more than likely causing the pin to not have power. I included a link to a helpful article on wiring for you to take a look at.
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  • Does Third Brake Module PP20-702 Fit 2020 Ram 1500
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