Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Quickly and easily install a 4-way trailer connector on your GMC Terrain with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required.
This custom-fit T-connector plugs into your GMC Terrain's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness.
Once installation is complete, the 4-way connector will be stowed beneath your GMC Terrain, 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.
Video of Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today in our 2012 GMC Terrain, well be installing the Curt T-Connector 4-Pole Flat Trailer Connector part number 56094. To begin our install, well first go ahead and open up the rear cargo hatch. Well need to remove both rear taillight assemblies and to do this there are two fasteners that have plastic caps and then the fasteners to remove. Well go ahead and use a small screwdriver to remove the plastic caps and then we can remove the two screw fasteners underneath. Once we removed the screw fasteners, well then go ahead and pop the taillight assembly out of its current position being careful not to break the alignment tabs underneath. Now with the taillight assembly removed, well go ahead and press the manufacturers wire connector locking tab and remove it from the taillight assembly. Well go ahead and set the taillight assembly aside for reinstallation.
Now with one side done, well go ahead and repeat the same process on the other side. With both taillights out of the way, we can now take our new wiring harness and start putting it into position. Well take the 4-pole connector and feed it down between the bumper fascia and the body or sheet metal of the vehicle until it drops down underneath. As were starting here on the driver side, well then take the green wire connector and follow the 4-pole connector leaving the yellow and brown connector behind the driver side taillight assembly where we can plug into the manufacturers wiring. Once weve plugged into the wiring, we can then go ahead and plug the connector back into the driver side taillight assembly and reinstall it. Next well get underneath the vehicle and well take our 4-pole connector and green wire connector, start routing to the center of the vehicle and the passenger side, keep in mind when routing your wire to stay away from any moving components such as steering or suspension or excessive heat such as exhaust. Now that we have the green wire connector over on the passenger side, well go ahead and feed it up behind the passenger side taillight assembly.
Now well go ahead and take the new wiring harness, plug it into the manufacturers wiring and the other end into the back of the passenger side taillight assembly. Next well take our white wire with the pre-attached ring terminal and this will be ground wire for our new 4-pole connector. Well need to secure it to the body of the vehicle. Note I recommend to locate an area where the sheet metal doubles up here behind the passenger side taillight assembly. Using a self-tapping screw, well go ahead and secure the ring terminal now. Once completed, well go ahead and reinstall the passenger side taillight assembly.
Next well get back underneath the vehicle and start securing our wire. Well use the black zip ties provided with the install kit to secure the wiring behind the bumper to the fascia brackets. Well then use some longer zip ties and secure the wiring to the hitch as it runs to the center of the vehicle. Well then take our 4-pole connector and wrap it up with some black electrical tape to help bundle up our wires as we route it over the hitch and secure it to the chain loop with the cap provided. Now that weve completed securing our wiring, well go ahead and cut off the excess zip ties to clean up our install look and now we can check for operation of the new 4-pole connector. With the ignition on and our test light grounded to the open terminal of the 4-pole, well test the first cover terminal which will be the brown wire for our running light circuit, the second will be the yellow wire for the left turn signal, left braking and the third will be the green wire for the right turn signal, right braking. Now that we know our 4-pole connector is ready to go, were ready to hit the road and that does it for the install of the Curt T-Connector Vehicle Wiring Harness 4-Pole Flat Connector part number 56094 on our 2012 GMC Terrain.
Average Customer Rating: 4.9 out of 5 stars (199 Customer Reviews)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.
by: no name01/14/2013
This wiring harness is very easy to install. I had a bit of trouble getting the tail lights out of our 2012 equinox but with a a second set of hand they slipped out without doing any damage. I used extra zip ties and wire loom to help protect the wire. Be sure to keep it away from the exhaust if you have a V6 with duel exhaust tips. I modified a Curt rubber tube cover to secure the harness to the receiver. I made sure to leave extra wire in behind the hitch so that I can pull it through when I need it. 63065
by: Ed H.06/24/2014
I've seen many aftermarket hitches that are obviously not built for a specific car, and they look terrible when installed. The hitch I purchased from Etrailer.com was a perfect fit for my car. It was built by Curt Mfg., and was surprisingly easy to install. I had the wiring harness installed in about 45 minutes, and it just plugs into existing wiring (no splicing). And the hitch bolted onto the car with no cutting, drilling or hammering. It was done in about an hour. The finished installation looks like it came with the new car ! The process was much less expensive than having the dealer install it. Excellent product !! 137454
by: Bill R.06/15/2014
Look, I have no doubt that the product is excellent. After all, it fits perfectly into and with the original equipment. The installation (I took my laptop out to my Equinox and ran through it, step by step) went without a misstep--well, I did drop a screw that held the rear light bracket in place and spent a while retrieving it from inside the car frame, but that was my fault. I also want to note that the video is correct in suggesting using longer zip ties, but I was able to make use of the provided ties, supplementing them with a few of my own. But here's the real deal: The staff at etrailer.com babysit you all the way from order to delivery and beyond. Amazon's a great way to shop, BUT I've ordered twice from etrailer and I'm convinced it is the place to go if you want the right part and SERVICE. Seriously. 135638
by: Dan M07/05/2013
Just installed Curt Kit # 56094 on my 2011 Terrain. Instructions are simple and easy to follow. Only took about an hour to complete. Etrailer was a pleasure to deal with, I recommend them highly. 87811
by: Kurt E.05/25/2013
Fit perfect. Good instructions. Easy do it yourself install. 81994
by: James Ruble08/17/2012
I need a wiring product for my 2012 terrain the the local didn't stock the right one. To order One would take three to four days and I needed it quicker then that (poor planning on my part) and they ask over double the price that I got from you. You also gave an option on shipping te and cost. I was very pleased with your service You can always purchase like products but when it comes to service your company stands out. I will be purchasing a flat tow bar in the near future and be ordering it from you. Keep up the good excellent service. Thanks Jim 52012
by: Chris M.06/28/2012
To EASY to install. I purchased this product for my 2012 GMC Terrain AWD 4 Cylinder. Just like the instructions I removed the screws for the tail lights, popped them off (you need to pull straight back and a little hard because the tail lights have straight clips behind them, they won't break, the clips go straight into the vehicle body) and clipped in the harness as directed. Too EASY. When putting the tail lights back on be cautious not to smash the rubber lining which runs above the tail lights on the vehicle itself. GREAT PRODUCT!!!!!!! 46024
by: Rob B05/28/2013
The wiring is very easy to install and worked perfectly for me the first time I used it. The video walkthrough was spot on, it only takes about 15-20 minutes to install and doesn't require you to run a wire up to your batterey at the front end of the vehicle. Besides installing the ground wire with the self-tapping screw, the rest of the instalation only involves plugging in the 4-way adapters to your existing taillight wiring. The product arrived as decribed and I would absolutely reccomend this product. 82234
by: Glen M.10/17/2014
I found the products I purchased from etrailer to be very good, easy to install at a reasonable price . I was pleased with my customer service from placing the order to delivery and follow up. I highly recommend etrailor and next time a purchase auto accessories I will start with etrailor. 156554
Pretty Easy. The Chevy Equinox tail light assembly has only two screws each. Easy to remove with a phillips screw driver. The wiring harness is pretty self explanatory. The wire coloring matched the basic wiring from the tail light, making it easy to match up. The harness has more than enough length to reach the hitch. It was a little tricky finding metal to drill for the ground but all and all a good product. The entire wiring project took me less than an hour. 143748
by: E Whitestone10/22/2011
Of the two Wire Harness's available for the Terrain and Equinox from etrailer, the Curt #56094 is absolutely the one to purchase. With this one, you do not have to run a wire all the way from the back of the vehicle to the front and make a Battery connection, like you have to with the other harness available. Excellent quality and installs easily, without the hassle of running a wire to the Battery. Curt trailer products are second to none. 25947
by: Stan S.05/09/2014
I bought this for my 2014 equinox, not being very mechanically gifted I had worry if I could actually do this but after reading what other customers had written I thought I would give it a try. Was I ever surprised at the ease of installing it. Any time I need something I will alway head straight to Etrailer.com I was so impressed with the quality and instructions I must give them an A++ and a at-a-boy 129725
by: Warren S.05/22/2014
The product was just like what I saw in the video and just as easy to install. I installed the trailer hitch and the wiring myself with my brother's help. We finished in less time than was estimated and checked out the wiring with a voltmeter. Everything worked just fine. Thanks for the installation video. I would not have tried the install myself if it were not for your video. Thanks. 131864
by: bob class04/24/2014
I had the chevy dealer install the hitch and wiring harness. They told me that the equipment was of great quality and easy to install. I was able to do these type things years ago, but at 75, a person has to admit it's time to let the younger guy's do the work. This is the second hitch and harness I've gotten from you. I have recomended you to several of my frends. Thanks Bob C. 127132
by: Robert M06/25/2013
The install went without a hitch, (No pun intended). I liked the product for the 2013 Equinox and the fit was perfect. I would recommend you finish protecting the wire with either plastic spiral wrap or the plastic split wrap to protect the wire from wearing against any sharp edges under the vehicle. It is readily available from your big box hardware store. 86044
by: William J.10/31/2013
This was a small challenge. I did it myself and have very few tools. additionally at 75 with knee replacements I cannot get up and down very well, nor can I sit on my knees. (Butt only) Other than the minor adjustments normal for metal sizing once treated all went very well. Zero issues...."IF" you don't count some pain. Very well constructed product. 105845
by: Sam H.03/18/2012
Quick delivery. Clear instructions, good quality (good powder coating job). Easy to install (you don't need to move the tail pipe). Make sure weld nuts on the vehicle are cleaned out well before starting. A little grease to the bolts also makes them thread easier. Used with a trailer light kit. As always, very satisfied w/ etrailer.com products. 34262
by: Jim B04/20/2011
Received hitch and wiring harness very quick. It took me about an hour to install both. Th Curt Trailer Hitch Receiver and Wiring Harness were both quality products. I had reviewed the on line video for installing both and had no problem at all. My wife is extremely proud of both her new Chevy Equinox and her new trailer hitch. thanks 12072
by: Dale H.02/26/2012
Simple installation...I mean SIMPLE!!! The only suggestion that I could make would be to have some sort of mounting bracked for the trailer connector instead of letting it dangle loose. I know the instructions show the rubber cap keeping it in place, but that is still a little flimsy. Otherwise, very easy and took 15 mins to install. 32587
by: john w04/28/2011
Everything about e trailer is great. The web site is first class to start with. All the info is clear and very helpful. Video instruction is awesome and so is the price, free shipping and speed of delivery. Clearly you know how to please your customers. I will recommend etrailer.com highly. Oh ya the product was perfect too! Thank You! 12498
by: Jan O.07/23/2013
Installing the hitch and the wiring was amazingly simple thanks to the instructional videos posted on your website. My husband installed the hitch and I installed the wiring and we were finished quickly. PLUS everything worked exactly as it should! Thanks for saving us lots of money by showing us how to do it ourselves! 91087
Both the hitch and the wiring harness were a breeze to install. Watched both install video's before attempting to the job and it made it very easy. Hitch looks great and wiring the harness with the T connectors made the electrical hookup a snap. Thanks for all the info (videos) that made this job simple. 68428
by: Indiana Dave04/14/2014
I received the towing hardware a few days earlier than I thought I might. I read the instructions a couple of times and had the hardware installed, by myself, within 30 minutes. It took me about the same amount of time to install the wiring harness. There were no surprises and I could not be happier. 124906
Curt T-Connector wire harness. Easily installed on my 2011 Chevy Equinox. Fit like a factory wire harness complete with waterproof connections. The video shows it all. Only thing I added was some black plastic wire loom to complete the illusion of a factory installation. Thanks for a great product. 14443
by: Pat L09/09/2013
Excellent video instructions - installed as described without issues. Hint: Before you route the passenger side wire bundle back up into the tail light assembly, make sure you have routed the wiring package and connectors in/around the hitch assembly through the openings and holes that you desire. 99137
Perfect fit. Easy to install. Wish they made a 5-pin version for trailers that have back-up lights. I had to splice in the fifth wire. Also added my own ribbed flex conduit (identical to factory install) to protect the wires from chaffing. You should consider offer it on your site. 2678
by: Mike F.07/23/2011
Couldn't ask for a more elegant and efficient install. Took all of a half an hour, and it was that long only because of my arthritis. Those cable ties become a bear when you fingers don't work right. And the dealer had the audicity to want a hundred dollars to do the same thing. 20013
by: Steve P.03/19/2011
Easiest installation of automotive electrics I have ever had to do!!! Drilled one small hole for the ground wire and everything else was a simple connection. Even removing the tail lights to make the connection was very easy. etrailer's video installation guide was very helpful! 9830
by: Halbert J.07/26/2013
Product was as I ordered it, delivery was fast and securely packaged. Installed product with no problem. Instructions were clear and easy to read, with pictures. etrailer took the work and worry out of my project. Highly Recommend, great parts and even better service. 91683
by: Brian F09/12/2012
Purchased the Curt harness and DrawTite hitch from etrailer. Both arrived when promised, great customer service, products installed very easily and exactly as described. Could not have been easier. Glad I did not pay someone to do this and ordered from etrailer instead! 54441
by: Bob W.05/07/2014
from start to finish, I did the install on the hitch and the wiring harness in less than 40 minutes. I was totally amazed. i watched the videos that was on your site was very helpful. thank you so much. just wished i could of received a hat with my order. Thank you 129506
by: Eric L11/17/2014
Great product. Easy install fast shipping. Highly recommended 161434
by: Fred k.12/28/2012
very easy to install on my 2013 GMC Ter ain 62130
by: Charlie T of Iowa03/17/2011
5 screws and some electrical tape combined with 10 minutes of time and it was done. Oh ya, 5 zip ties too. Same total time though. Super easy. Watch the video before the product arrives and you will sail through the install without the directions. 9564
by: Dave J.06/01/2012
Website easy to use, organizes product that fit your vehicle so it is easy to find what you need. Not just instructions, but links to videos, questions and answers as well are great. And the hitch and harness were easy and quick to install. 42372
by: Martin V02/27/2014
Product arrived on time. I ordered it on Sunday, within about 30 minutes I received two emails from different people telling me that my order was being taken care off. Product worked perfectly and would recommend this product and company. 117923
Great easy to install wiring was just as easy no cutting or drilling just watch the video and follow the instructions all of the info is there it took me about 50 mins from start to finish now just to see how it handles over the years 87068
Great easy to install wiring was just as easy no cutting or drilling just watch the video and follow the instructions all of the info is there it took me about 50 mins from start to finish now just to see how it handles over the years 87064
by: Ric M.10/14/2013
This wiring harness was an exact fit for my 2013 Equinox and installation was easy after watching the etrailer.com instructional video. I was totally satisfied with every aspect of this purchase and highly recommend etrailer.com 103777
by: Glen M.08/08/2014
The product (wiring harness) was installed in about 20 minutes. The video I watched was exact and helpful. I would recomend this product to anyone with a Chevy Equinox. The hitch and wiring looks like it was factory installed. 145276
Ordered trailer hitch my 2013 Equinox with curt wiring, The shipment came as ordered very fast plus free shipping installed as the viedo showed very pleases with E-Trailer would recommend them very highly great place to shop. 157903
by: Don I06/07/2012
Completely satisfied with product and service. Watched the video and installed myself in about a half hour. Should be much less time for someone younger than my age (77). It takes me longer to get up off the ground nowadays. 43092
by: Terry Kinnaman08/01/2011
Bridget was most helpful in suggesting I might need this. The instructions were very good to help me get behind the tail lights. installation was about 40 minutes. The GM connectors make installation very straight forward. 20657
The hitch is not installed as yet, but since I have done business with you before I am sure it is fine. The prior purchase just towed a trailer with a full sized vehicle on it for 150 miles with no problems. Thanks. 156970
by: Heidi C09/06/2013
Trailer Wiring. Works great and it was easy to install, especially with the video provided online. It's installed into the rear lights so there is no spicing of any wires, just a quick connect and it's out of sight. 98613
by: Adam L.06/20/2014
So Easy!!! The videos provided were amazingly easy to follow. Install took about 15 min. Way easier than the old days of having to splice wires together. Alot safer and more dependable too. Amazing Product. 136703
by: Ron B.11/08/2013
These trailer adapters are well worth the money. It simplifies the hook up for trailer lights and it is all water tight. After watching the video it took no time at all and I was done. Great product line. 106738
by: Bob S.06/16/2014
Received it faster than I figured. I did not have any trouble installing the hitch. It took only a half hour to install just like they said on the web. Wiring took a little longer. I am very satisfied. 135705
Installed the product myself in about 20 to 30 min on my 2011 GMC Terrain, and it was extremely easy. I hauled a trailer with it this past weekend all of the lights worked perfectly just like they should. 54599
Great quality product. Very easy to install and I'm a klutz. ettrailer only sells the best at a great price. I've purchase hitches from them for years and always the same result. Great service 47909
Ask the Experts about this Curt Custom Fit Vehicle Wiring
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.