Custom Original Equipment Vehicle-to-Trailer Connector
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Curt Custom Original Equipment Vehicle-to-Trailer Connector

Part No. 55384 Warranty Details  
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Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot. At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it. CURT custom original equipment vehicle-to-trailer connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection. They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Though this special socket is not equipped on every vehicle, a CURT custom OE wiring connector (also called a T-connector) utilizes the socket for simple, stress-free installation. Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom OE connector uses a single OEM-compatible plug and instantly provides a standard vehicle-to-trailer wiring connection, typically in the form a 4-way flat. All CURT custom original equipment vehicle-to-trailer wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular connector provides a 4-way flat socket while retaining use of the existing OEM 7-way. It is designed to be a custom wiring option for a number of specific applications within Buick, Cadillac, Chevrolet, Dodge, Ford, GMC, Hummer, Infiniti, Jeep, Nissan, Ram and Saturn (to verify your vehicle compatibility, see the CURT application guide at It comes with a dust cover to keep the connector socket clean when not in use and a one-year limited warranty. To ensure long-lasting reliability, the majority of CURT custom OE connectors are made in the USA, and all are thoroughly tested for optimal functionality.

Product Features:
  • Plugs into existing OEM socket to add a 4-way flat and retain use of OEM 7-way
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Dust cover included to keep connector clean when not in use
  • Slit loom keeps wires contained and well protected
  • Backed by a limited one-year warranty
  • Made in USA
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12 Volt DC Outlet Quantity:Yes
Adapts From:OEM
Adapts To:4-Way Flat
Test Mode:No
Wire Harness Length:36-108 (Varies) in
Wire Quantity:4

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3 Questions | 3 Answers
Displaying questions 1-3
  • Q:

    where do you plug this into and is it on all trucks
    Asked on 5/8/2017 by tom

    1 answer



      Hi Tom! This Curt Custom Original Equipment Vehicle-to-Trailer Connector (Part No. 55384) is used to provide a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights and it is also designed to be used with a vehicle that has a factory tow package. Usually, when they include a tow package on a vehicle, they'll put a 7-way connector at the back of vehicle, where you can plug in a 7-way connector only. So you could use this connector to plug into the existing Original Equipment Manufacturer socket to add a 4-way flat and retain use of 7-way connector. To check the compatibility, please provide us with the year, make, model and engine size of your vehicle.

      Answered on 5/10/2017 by Solomon from AAP
  • Q:

    pic shows 7 way extension, spects. say 4 flat, which is it?
    Asked on 6/29/2014 by Dave from 16438

    1 answer



      Hi Dave, glad to serve you! This part adds 4-way flat to your original equipment manufacturer 7-way system. This is for use with original equipment manufacturer tow plugs. Simple plug and play design eliminates the need for cutting or splicing.

      Answered on 7/2/2014 by Steve from AAP
  • Q:

    Is this the plug in to the harness .the T connector ?
    Asked on 10/3/2012 by Dwayne from Columbus Ohio

    1 answer



      This Curt Wiring T-Connectors - part# 55384 adds 4-way flat to your OEM 7-way system. This is for use with OEM tow plugs. However, this part is vehicle specific. In order to check the exact fit, please provide the year, make, model and engine size of the vehicle. For any further assistance, you may also visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

      Answered on 10/4/2012 by Vincent from AAP
Displaying questions 1-3

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