Trailer Brake Controller Installation - 2015 GMC Sierra 1500

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How to Install a Trailer Brake Controller on a 2015 GMC Sierra 1500


Today on our 2015 GMC Sierra, we're going to be taking a look at and also showing you how to install the Hopkins InSIGHT. Its part number is HM47297. We're also going to be using part number HM53075, which is the Hopkins pigtail adapter. Now, the InSIGHT is a proportional brake controller, which essentially means that inside of the unit there's going to be a sensor. That sensor detects when you step on your brake, so if you just step on them lightly, we're going to have a light amount of pressure just helping us to slow down. In an emergency situation when we really have to step on our brakes, it's going to sense that and send power back to accordingly. Now, the benefit of a proportional braking system is that unlike time-delayed systems we don't have to wait for our braking power to go to our trailer.

If we need it in an emergency, we're going to have it instantly. If it's just standard braking, coming to a stop, it's going to be a little bit less, so it's going to send custom braking back to our trailer rather than a pre-programmed power band. We'll have the buttons here on the right side. It's going to allow us to adjust up and down the level of gain that's going to be output to our trailer when we use our brakes. Here on the other side we're going to have our sync button. This is basically going to allow us to change the quickness and aggressiveness that our brakes are going to be applied to the trailer.

The higher we have this set, we could go all the way up to 7 with it, all the way down to 1, that's going to be how quickly and how aggressively those brakes are applied. Now, for mounting our smart box, we're going to be using the kick panel right here. As you can see, we'll be able to place that up here pretty high to keep it up and out of the way. You'll just want to ensure that you have it low enough so you don't have any interference with your parking brake. You can see that's a good spot, so we can bring that right up to that top edge. Now, before we get this installed, we've got two plugs that we have to put in the back. What I like to do is get all of that routed down here so we know exactly where we're going to be plugging it in, get it plugged in, and then mount our box.

We'll put our tape on and we can put that right in place. Now, the flex control we can mount to any flat surface; you can do it really anywhere on your dashboard. You can do it right here. It'll give us a nice flat surface to mount to and also allow us to tuck our wire right down and in to keep that hidden. Now we'll route that right over our big fuse box up here, which is also where we'll be plugging in our wire for our brake controller. The display is going to go right over in this area. We want to pop off this panel.

Do the same thing with this wire. We want to feed that in so we can get ahold of it down there, and we'll route it out that same location that our other wire came out of. We'll mount that display right there. We can just put our panel back in place. Now we'll pull the cover off right here that's going to be just to the left of the brake pedal. The two tabs here on the outside, and then right over here on the inside edge, there's another one. It's kind of tough for you to get to. Now once we've got that out of the way, we'll take our adapter. It's going to plug in, you can see that longer slot here, right above that. Just like that. Now you'll want to bring that wire upward. That'll let us slide our cover right up and back on it. Now we'll get our smart box plugged into that pigtail. We're going to take our cables. The larger one comes from our smart display. The slightly shorter one is going to come from our smart control. Get those placed in there. The slack, we're going to pull all of that up above that fuse box we just took the cover off of, and we're going to zip tie it all up and out of the way up there so we won't have to worry about it coming down and getting in the way of our feet or anything. Now I'm going to tape up the first maybe eight inches or so of this; that way, it'll just look a little nicer. We won't have a bunch of those individual wires of different colors down there. All right. Mounted nice and lever there. A few zip ties to tidy up those wires, and we'll be ready to check out the system. Now, to test out our installation, we're going to plug in our trailer, in our case, our trailer simulator. You'll see that little red light come on indicating that we've got a good connection made with our trailer. That red light constantly monitors the connection to our trailer. If it we're to come disconnected, you'll see the light shut off indicating that. That's going to let us know we need to head back, address whatever our problem might be, and get our connection re-established. Now, for the second step in testing it, we'll operate our manual override lever. In our case, you're going to see it on our simulator. On your case, you would actually hear your brake activation at your hub. With everything working properly, that's going to complete our installation of the Hopkins InSIGHT, part number HM47297 on our 2015 GMC Sierra.


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