Curt T-Connector Vehicle Wiring Installation - 2020 GMC Acadia

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How to Install the Curt T-Connector Vehicle Wiring on a 2020 GMC Acadia

Hi there Acadia owners today in your 2020 GMC Acadia, we're going to be taking a look at and showing you how to install CURT's 7-Pole Vehicle Wiring Harness. And this is what our harness looks like when it's installed. Now, we did add some additional brackets to get it mounted up, but included with your kit, you are going to get everything you need to get a functioning 7-Way. You just don't get the brackets to get it mounted. We've got plenty of different bracket options though, available here at and a big part of why they don't come with it is because each vehicle is going to be slightly different depending on your option. So, they're not sure exactly how you would want it mounted on your particular vehicle.

It's going to provide you with your standard 7-Pole connector though. So, we're going to have all of our necessary lighting signals, including our left turn, right turn, tail lamps, and brake lamps.Additionally, we'll also have a reverse light signal as well as a charge line so we can charge the battery on our trailer. And it is wired up for a brake controller for the signal back here, but you will have to add a brake controller to your vehicle if you are planning on using that function. My favorite part about this wiring solution is how easy it is to get it installed. We have a 7-Pole connector here for our trailer to plug into and on the opposite end of our harness, we have 2 connectors that plug just directly into factory connectors located here at the back of our vehicle.

Having those custom fit connectors couldn't make the installation any simpler because you just simply have to plug them in, mount up your connector, and you're good to go.Speaking of how easy it is, why don't you follow along with me and we'll have it done here before you know it.We'll begin our installation underneath the vehicle by retrieving the factory connectors that we'll need to tap into. They're pretty close to the center, but slightly on the driver's side. So we can go in over here in this opening next to our hitch. We'll then reach up. We're going to pull down the large Hector here with 4 wires going to it.

This is one of them that we'll need. Once you've got to pull down, the red locking tab here, you'll just push up to release it and then we can press it on the release tab there and pull the dummy plug out of it.It's easier if you use one hand to press in on the release tab and the other hand to pull the dummy plug out. There is another connector we're going to need up here as well though, and it's located just below the connector we took out. We've got this plastic piece right here, and this one's located just on top of that plastic piece. So, we can just pop this one off of there as well.

And we're going to press it on the release tab here. And then we can slide out that dummy plug. We can now take our new harness and we're just going to plug these connectors right into our factory harness's plug the two together they'll line up. You'll see, it's got these little ears here on the corners. Those will line up with those. Make sure they click in.And then we're going to do the same thing now with our 4-Pin connector. We're just going to bring that one over. Line these two connectors up and plug them in as well. On your 4-Pin connector here, once you've got a snapped in, make sure to press the red locking tab back down. Now that we've got those plugged in, we can just reach back up top and these back into locations we pulled them down from.Now, you're going to need a location to Mount your 7-Pole connector. A bracket does not come included with your kit. So you will need to purchase a bracket. We're going to be using two different brackets for our solution. So, we don't have to make any modifications to the vehicle. We've got both of those brackets here. Here we have our 7-Pole bracket, which we have attached to our long no-drill bracket. Now, you could just get a 7-Pole bracket and run it into your hitch or something like that or your bumper, but then you have to modify it. If you get a no-drill bracket like this, it will go on your hitch.You'll receive a clamp that comes with it. That will just go right around your hitch. We'll slide the other end of the clamp through there. It's alright if it slides down, we can adjust it here as we're tightening it up. And then once you've got it pretty well where you want it, we'll just push the little end down. That'll kind of hold it in place and we'll just tighten it up with an 8mm socket. The excess here you can trim off and I do recommend it.We can now install our 7-Pole connector. So we'll just slide it through our bracket that we installed and then mount it up with the hardware that comes included with your bracket. We'll just slide it through, and then secure it with the nut on the opposite side. We're going to do the same thing for the 3 remaining holes.Once you've got those snugged up, we can take the other end of our harness. We're going to just bring it right around back here and plug it into the back of our 7-Pole connector.After you've got it snapped all the way in, I like to just give it a little tug on the back without pressing in on the release tab to make sure it doesn't come off. And one of the things that I didn't put on here, because we are just doing a demonstration here, is dielectric grease. I highly recommend that you put dielectric grease on the inside to prevent any corrosion from occurring on the inside. inaudible 00:05:08 If you need dielectric grease, you can get some here at'll now want to plug it in and test it out. I highly recommend using a tester like we have here. So, you can verify that everything on your vehicle is working in the event that you do have a short or something on your trailer. You're ruling that out. You can get testers like this here at You'll already notice that one of the lights is lit up and that's our charge line circuit. So we can see that we are putting out a charge to our trailer, but you also want to check the rest of your circuits. We have our left turn signal, right turn signal, tail lamps, brake lamps, as well as reverse.And the last one we have is a brake controller signal, but we don't have a brake controller on our vehicle. So, we can't show that one off today. With all of our signals working properly though, we're ready to hook up our trailer and hit the road. And that completes our installation of CURT's 7-Pole Vehicle Wiring Harness on our 2020 GMC Acadia..

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Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
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Jacob T
Employee Dustin K
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Dustin K
Employee Chris R
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Chris R
Employee Jonathan Y
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Jonathan Y
Employee Robert C
Test Fit:
Robert C
Employee David F
Test Fit:
David F

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