Front Mount Trailer Hitch Installation - 2015 GMC Sierra 3500 - Curt

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How to Install a Front Mount Trailer Hitch on a 2015 GMC Sierra 3500


Today in our 2015 GMC Sierra 3500, we're going to be installing the Curt Front Mounted Trailer Hitch, Part Number C31071. Our hitch has a 500 pound tongue weight and a 5,000 pound towing weight. With a 9,000 pound straight line pulling capacity. It's a fully welded, steel construction with a square cross tube. It's designed to hook up to the side plates which are secured directly to the frame. Here are a couple measurements that will assist you with selecting accessories such a ball mount, winch mount, or a snow plow. From the center of the hitch pin hole to the other most edge of the front bumper is 7-3/4 inches.

From the top of the receiver tube opening to the ground, there's 9-3/4 inches. Now let's go ahead and show you how to install the hitch. Now keep in mind that we have a totally of 4 attachment points, 2 attachment points for each side. Each process we do here on one side will get repeated identically on the opposite side. Here at the bottom of the frame, at the very front that secures a tow hook in the frame there's a bolt that will need to be removed. We're going to remove the bolt, and set it aside but hang on to it as we'll use it to secure the hitch. Going through the side of the frame there's another bolt that secures the tow hook.

We're not going to remove it, but we are going to loosen it to make it easier to install our hitch. You can see we can now move the tow hook around and we'll go ahead and leave it like that for now. Next, I go over to the drivers side, I repeat the same process. Next, we're going to install the new hardware. Our attachment point is the pre-drilled hole here in the frame just behind the front body mount. Going further down the frame there's an access hole, this is an oval or rectangle hole already in the frame. The hardware we're going to be putting in the frame would be a new 1/2 inch carriage bolt and spacer block.

The bolt and block will go into the frame and come out the pre-drilled hole. To get our hardware in place we use the 1/2 inch pull wire provided with the install kit and then to secure our hitch we'll use the 1/2 inch flange nut. Let's go ahead and get our hardware in place. I'm going to take the bolt leader or pulls wire feed it through the attachment point and out the access hole. Now once we have the end of our pull wire coming out the access hole, we take our block slide it on and thread our bolt into the end. We'll then feed the block and bolt into the frame separately.

I'm going to go ahead and pull them both out the attachment point. Now our hitch side bracket is going to get secured here so we're going to push the block and bolt back into the frame so we can get our hitch in place. We'll leave our pull wire attached so we can feed it through the attachment point in the side bracket of our hitch and then pull it out while we're gaining access to it. Now we have our passenger side done, I'll move over to the drivers side and repeat the same process. We're now ready to go ahead and put our hitch in place. Its a good idea to get an extra hand to help you hold the hitch while you install your fasteners. Get the hitch close to the frame, take our pull wire, feed it through. Now we've got a pretty tight fit between the side bracket and the frame, it's got the pull wire pinch so I'm just going to pry out on the side bracket enough to get my pull wire out. Then we can pull the carriage bolt and block out the side of the hitch. Now we've got our carriage bolt out and access to it. I'm going to go ahead and remove the pull wire. Now the pull wire or bolt leader out of the way we can go ahead and install our flange nut. We're just going to do a finger tight at this time because we still need to rotate our hitch into position for our forward attachment point. Now we have both rear fasteners in place. Next we'll go ahead and take the front of our hitch rotate it up to the frame, line it up with the weld nut from the tow hook and reinstall the manufacturers bolt. Again, we'll just install finger tight until we have everything in place. Just like that we've now got our hitch and hardware in place, we're ready to go ahead and tighten it down. I'm going to start with the forward attachment point, then the manufacturers tow hook, and then our rear attachment point. Now once we have everything tightened down we can go ahead and torque to specifications as indicated in the instructions. Just like that in minutes we've gone ahead and installed and secured the Curt 2 inch Front Mounted Trailer Hitch, Part Number C31071 on our 2015 GMC Sierra 3500. .


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