Manufacturer | CURT |
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Place of Business | DFW AIRPORT, TX, 75261 US |
Brand | CURT |
Model | Custom Wiring |
Product Dimensions | 17.78 x 10.16 x 5.08 cm; 317.51 g |
Item model number | 56429 |
Exterior | Painted |
Manufacturer part number | 56429 |
Item Weight | 318 g |
Country of origin | Mexico |
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CURT 56429 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Chevrolet Equinox, GMC Terrain
Purchase options and add-ons
Brand | CURT |
Material | Rubber |
Item dimensions L x W x H | 17.8 x 10.2 x 5.1 Centimetres |
Item weight | 0.7 Pounds |
Cable type | 4-Way Flat |
Connector type | 4-way Flat |
Recommended uses for product | trailer wiring |
Manufacturer | CURT |
UPC | 612314564293 |
About this item
- EASY TO INSTALL. No cutting! No splicing! This trailer wiring harness kit plugs into existing factory wiring on your vehicle and equips it with a standard, rear 4-pin trailer wiring connector for plugging in and towing a trailer
- STANDARD CONNECTOR. This plug-in 4-flat trailer wiring can be used to connect trailer tail lights, brake signal lights and turn signals. 4-way trailer light wiring is popular on a wide variety of trailers, adding versatile towing options for your vehicle
- VEHICLE-SPECIFIC. This vehicle-trailer wiring harness is designed for select models of the Chevrolet Equinox and GMC Terrain (factory tow package required)
- EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this vehicle socket. It features tabs on the top and bottom for a better grip when plugging into your trailer or unplugging
- DUST COVER. To promote long-lasting use and weather resistance, this 4-pin trailer wiring harness comes with a rubber dust cover. It easily fits onto the 4-way flat connector when not in use, protecting it against the outdoor elements
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Top Brand: CURT
From the manufacturer

Wherever your work or play takes you
CURT offers custom trailer hitches, electrical products and a complete line of towing accessories to get you there with confidence and enjoy every mile of the journey.

CURT Custom Vehicle-Trailer Wiring Harness
Custom fit. Plug-and-play. Reliable power.
A CURT custom trailer wiring harness is the easiest way to equip your vehicle with the proper electrical connection for towing a trailer. Our custom wiring offers simple, plug-and-play convenience with no cutting or splicing required, and provides a reliable connection for powering your trailer lights.
Best of all, each CURT custom trailer wiring harness is made vehicle-specific for a unique make and model. This makes installation hassle-free and ensures optimal performance with your vehicle.
Key features of CURT trailer wiring
- Simple, plug-and-play installation
- Constructed with SMT circuitry
- Provides a standard trailer wiring output, usually 4-way or 5-way flat
- Dust cover included to keep connector clean when not in use
Installation of CURT custom vehicle trailer wiring
Two types of trailer wiring
CURT offers two types of custom trailer wiring: custom wiring harnesses and custom wiring connectors. Both are made for specific vehicles, and both require zero cutting or splicing.
Custom trailer wiring harnesses
A custom trailer wiring harness (also known as a ‘T-connector’) is designed to ‘T’ into your vehicle’s taillight assembly. This simply requires access to the taillight wiring.
Custom trailer wiring connectors
A custom wiring connector uses a single plug to plug into a designated OEM socket on the vehicle. Not all vehicles are equipped with this socket, but it does make installing very easy.
Both vehicle-specific
Each custom trailer wiring harness and connector is made for a specific make and model, featuring the necessary components to provide a standard trailer wiring output.

Selecting custom wiring
Whatever your lifestyle, choosing the right CURT custom trailer wiring harness for your vehicle is easy. Simply use your vehicle's year, make, model and style.
Benefits of CURT surface mount technology (SMT)
Minimum heat generation
The high-quality components used in our custom trailer wiring create very little resistance to reduce heat, limit voltage drop and extend the life of the circuits.
Optimum light intensity
SMT is manufactured with automated processes for maximum consistency and the highly efficient circuitry promotes optimum intensity and life for the trailer light.
Durable performance
Surface mount technology is able to better withstand shaking and vibrations, conditions that are common while towing, compared to traditional through-hole-mount tech.
Product description
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 wiring 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. Although this special socket is not equipped on every vehicle, a CURT custom 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 wiring 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 wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Chevrolet Equinox and GMC Terrain (to verify your vehicle compatibility, see the CURT application guide at curtmfg.com). It comes with all necessary hardware to establish a solid connection. It also 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, all CURT custom wiring connectors are thoroughly tested for optimal functionality.
Product information
Technical Details
Additional Information
ASIN | B084HFJLM5 |
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Customer Reviews |
4.6 out of 5 stars |
鶹 Rank |
|
Date First Available | Feb. 7 2020 |
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This Item ![]() CURT 56429 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Chevrolet Equinox, GMC Terrain | Recommendations | |||||
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Price | -7%$56.87$56.87 Was: $61.11 | $36.99$36.99 | $39.99$39.99 | $32.99$32.99 | $45.99$45.99 | $86.99$86.99 |
Delivery | Get it by Tuesday, Aug 12 | Get it by Monday, Aug 11 | Get it by Tuesday, Aug 12 | Get it by Tuesday, Aug 12 | Get it by Tuesday, Aug 12 | Get it by Tuesday, Aug 12 |
Customer ratings | ||||||
Sold by | 鶹.ca | Camotokiit | MECMO | MECMO | MECMO | MECMO |
cable type | 4-Way Flat | power and signal wires | Flat | Flat Ribbon | Flat Ribbon | Flat Ribbon |
connector type | 4-way Flat | 4 broches plates, connecteur 6 broches (femelle) | Flat | 4-way Flat Trailer Connector | 4-way Flat Trailer Connector | 4-way Flat Trailer Light Connector |
material | Rubber | Copper | metal | Rub | Alloy Steel | Copper |
Brands in this category on 鶹
Customer reviews
Customers say
Customers like the easy installation and functionality of the cable assembly. They mention it's simple, fast, and the quickest plug-and-play trailer wiring they've ever done. Customers also say it works perfectly.
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Customers find the cable assembly easy to install. They mention it's simple, fast, and the quickest plug and plug trailer wiring they've ever done.
"5 minute install on the Equinox, works perfectly." Read more
"This was the quickest plug & plug trailer wiring I’ve ever done. 2022 GMC Terrain" Read more
"Easy plug in and use, I bought the separate mounting bracket for the vehicle side plug, for an application like this, I think the bracket should be..." Read more
"It's literally a plug n' play product. Extremely impressed and would definitely recommend." Read more
Customers are satisfied with the functionality of the product. They mention it works perfectly.
"Works perfect, but be careful with installation. The assembly contains 2 relays...." Read more
"5 minute install on the Equinox, works perfectly." Read more
"Fitgreat and work well" Read more
"perfect , this worked perfectly on my 2021 equinox, the relays are a little noisy, but you wont hear it when your driving,," Read more
Top reviews from Canada
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- Reviewed in Canada on June 24, 2023Verified Purchase5 minute install on the Equinox, works perfectly.
- Reviewed in Canada on April 14, 2025Verified PurchaseWorks perfect, but be careful with installation. The assembly contains 2 relays. Make sure they don't touch ANY part of the vehicle, bumper, frame, floor. Tie-wrap them on the wire harness with some loose. Otherwise you gonna hear a loud and annoying CLIC each time your stop lights goes ON/OFF, braking or flashing. Amazing how this little vibration transfer to the whole body. After making them "suspended" everything is good! I recommend to install it BEFORE the hitch since you have lot more room to work.
- Reviewed in Canada on January 10, 2025Verified PurchaseFitgreat and work well
- Reviewed in Canada on August 29, 2022Verified PurchaseThis was the quickest plug & plug trailer wiring I’ve ever done. 2022 GMC Terrain
- Reviewed in Canada on July 10, 2023Verified PurchaseEasy plug in and use, I bought the separate mounting bracket for the vehicle side plug, for an application like this, I think the bracket should be included, since the harness is external, behind the bumper, without a bracket, the plug would just dangle below the bumper. With a bracket, I would have given 5 stars.
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Reviewed in Canada on May 23, 2024Verified PurchasePour un GMC Terrain 2024 Denali pour le branchement il est situé côté gauche arrière dans le bumper en haut .
- Reviewed in Canada on April 3, 2021Verified Purchaseperfect , this worked perfectly on my 2021 equinox, the relays are a little noisy, but you wont hear it when your driving,,
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Reviewed in Canada on May 4, 2023Verified PurchaseFait tres bien pour Chevrolet 2018 equívox et le prix est trois foix moins dispendeux que GM.
Top reviews from other countries
- RenoReviewed in the United States on May 3, 2025
5.0 out of 5 stars Plug and play on a 18 equinox Lt. fit great
Verified PurchasePlug in compatible, Good quality, great deal. Plug and play on a 18 equinox Lt. - fit great , if your looking for the right trailer lights 4pin harness that is plug and play on the equinox, this is it. Find the manufacturer plug point underneath the rear bumper cover, take the plug cover off, plug this in , zip tie the relays & wires up . Ready to row.
- GrizzitReviewed in the United States on April 23, 2025
5.0 out of 5 stars Works Well as Expected.
Verified PurchaseWorking well and as expected. Two thumbs up. Not much to say except it performs well and would buy again if ever needed. Though I think it will probably last the life of the car.
- MDPReviewed in the United States on November 14, 2024
5.0 out of 5 stars Fits 2021 Chevrolet Equinox LS without tow package
Verified PurchaseI have a 2021 Chevrolet Equinox LS that does NOT have the factory OEM tow package. I added a hitch for a bike rack and hitch-mounted cargo carrier, and wanted trailer wiring so that my brake, running, and directional lights could be seen clearly when covered by the bikes (or cargo on the rack). I got under the car and verified that there was a factory-installed plug for this Curt wiring harness (see picture). It actually surprised me that it had been prewired, since my 2021 Equinox is essentially the “base” model with no big bells and whistles.
Installation was very simple, once I figured out how to get my big hands up between the hitch and fascia/bumper to install it and zip-tie the wires in place. I then used these 2 brackets to secure the 4-pin connector coming from the wiring harness to the hitch (see picture):
https://www.amazon.com/dp/B001GK9E14?ref=ppx_yo2ov_dt_b_fed_asin_title
https://www.amazon.com/dp/B001GKBBFG?ref=ppx_yo2ov_dt_b_fed_asin_title
I used a tester to verify that all of the lights and turn signals worked correctly. Beginning to end, the entire project took about 30 minutes. The finished hitch and 4-pin connector (mounted on the brackets) can be seen in the picture.
MDPFits 2021 Chevrolet Equinox LS without tow package
Reviewed in the United States on November 14, 2024
Installation was very simple, once I figured out how to get my big hands up between the hitch and fascia/bumper to install it and zip-tie the wires in place. I then used these 2 brackets to secure the 4-pin connector coming from the wiring harness to the hitch (see picture):
https://www.amazon.com/dp/B001GK9E14?ref=ppx_yo2ov_dt_b_fed_asin_title
https://www.amazon.com/dp/B001GKBBFG?ref=ppx_yo2ov_dt_b_fed_asin_title
I used a tester to verify that all of the lights and turn signals worked correctly. Beginning to end, the entire project took about 30 minutes. The finished hitch and 4-pin connector (mounted on the brackets) can be seen in the picture.
Images in this review
- MikeReviewed in the United States on March 14, 2024
5.0 out of 5 stars Works
Verified PurchaseNothing to dislike was very easy to install just unplug the the factory installed cover and plug in the new wiring harness and your done.remember to pull the red pin up and push the black tab in to remove the factory cover and push the red pin down after you plug in the harness.I was thinking the price was a little steep for the wiring harness until I received it and saw what was included with it,yes it is well worth the price,may need a harness for the wife’s vehicle will definitely purchase from this company