Instant Savings on Select Curt Products

GMC Sierra Trailer Wiring

Select Vehicle Year

  
Trailer Wiring

Available Years for GMC Sierra Trailer Wiring


Trailer Wiring Harness

Make installing your trailer wiring harness as easy as possible with a custom fit wiring harness. Trailer wiring from Draw-Tite, Curt, Pollak, Tow Ready, Bosal, and Hopkins eliminates or reduces the need to cut and splice wires. It also helps to protect your vehicle's sensitive electronics from mis-wired trailers.

Choose the year of your vehicle to the left to find a custom fit trailer wiring harness.




Wiring Adapter Fitguide



Trailer Connectors and Adapters



Wire and Wiring Accessories



Trailer Wiring Manufacturers



Search For Custom Fit GMC Sierra Accessories
Select A Category Below



GMC Sierra Custom Fit Vehicle Wiring Videos

Demco 5th Wheel/Gooseneck Wiring Harness Installation - 2011 GMC Sierra

Speaker 1: Today on our 2011 GMC Sierra, we're gonna be taking a look and showing you how to install the Demco fifth wheel gooseneck 90 degree wiring harness with seven pole plug, part number DM8555002. Now, this is what you're gonna get in your kit. It's gonna hook directly into your factory wiring. And the other end's gonna hook directly into the side of your truck. The benefit of having this is when you hook your fifth wheel up, you can run the wire directly from your fifth wheel right into the bed of your truck and wiring stays in. Instead of having inaudible 00:00:33 way underneath on your bumper and having to run the wire up and over.First thing we need to do, is you see this section here inside of the bed.



Fifth Wheel and Gooseneck Wiring Harness Installation - 2011 GMC Sierra

Today a 2011 GMC Sierra. We're going to the Draw-Tite fifth wheel and gooseneck wiring harness with a 7-pole connector, part number 20110. A few things to know about wire harness is that it's length is 7 and 1/2 foot long so you can keep it near the tailgate or made for a sliding camper. You can run it towards the cab of a truck. It does simply plug it between OEM wiring harness and the factory installed 7-way connector. Also, this does retain the use of the factory 7-way inaudible 00:00:27 vehicle so you have 2 in the back of your truck, one in the bed and one in the bumper.



Trailer Wiring Harness Installation - 2013 GMC Sierra

Today on our 2013 GMC Sierra 3500 we're going to be showing you how to install the Bargman 5th wheel/goose neck 90 degree wiring harness with the 7 pole plug. This is a 9 foot long extension. It's part number is 50-97-410. We need to find a suitable mounting area for our wiring. That's the first step our installation. Our customer has already spray painted an area here where he wants it to go.



Fifth Wheel and Gooseneck Wiring Harness Installation - 2001 GMC Sierra

Today on our 2001 GMC Sierra, we'll be installing the Pollack 5th Wheel and Gooseneck Trailer Connector, part number PK11893-11932. Now to begin our install, we'll first go ahead and find a location to mount the new 7-pole connector and drill out our holes. In our pickup bed on the driver's side just behind the rear wheel well is a good location. Using a 2-inch hole saw bit, we'll go ahead and drill out our hole. Now in order to get our wiring harness fed from underneath and up through our hole, we'll need to remove the two fasteners that secure the mudguard here behind the wheel well. There's one just on the inside of the wheel well lip and one underneath the tail light area. Once we have the fasteners out, we can go ahead and pull the guard down. Now that we have the wire fed into position, we'll move back to the pickup bed where we'll install the wires into the back of the connector. Now when installing our wires, each connector is faintly marked with a number.



Hopkins Endurance Fifth Wheel Wiring Harness Installation - 2013 GMC Sierra

Today is 2013 GMC Sierra. We're going to install part number 41157. This the Hopkins Endurance Fifth Wheel Goose Neck Wiring Harness. All right, now the first step of our install is to go ahead and find a location for our 7 Pole Connector. This will be our 7 Pole connector, we would like it to install about right here. All right first step is to drill a quarter inch pilot hole.



Pollak Twist-In Trailer Connector Installation - 2012 GMC Sierra

Today on this 2012 GMC Sierra, we're going to install part number PK11916. First thing we need to do is go ahead and remove the cap that is on bumper of our truck. We'll push down a small tab and rotate it and it will come through. Then the back side of the cap is a factory towing package and its wire harness. We're going to pull them out a little bit and we'll release the cap from the harness. There's a small white lock that we have to remove then we'll push down at the center of the latch so we can pull the cap off the wire harness.



Trailer Wiring Harness Installation - 2012 GMC Sierra

Today on our 2012 GMC Sierra Denali, were going to install the Bargman seven pole harness, part number 50-97-410. The first step of our installation is to locate a suitable spot for our seven pole connector. Here in the bed of the truck, is an excellent location, as behind it we have enough clearance before we meet the outside of the fender. Next well need to drill a two inch hole to feed our wire through.Now with our hole made, we can go ahead and take the new seven pole harness and carefully feed it through the hole. You want to be very careful because the edges that we just created by drilling the hole will be very sharp. Now weve got our seven pole into position, we can go ahead and use the cell tapping screws provided with our install kit to secure it.Now underneath the vehicle well go ahead and start routing our wire over to the back of the bumper.



Pollak Twist-In Trailer Connector Installation - 2010 GMC Sierra

Today we are working on a 2010 GMC Sierra. We are going to install a 7 pole connector by Pollack, part number pk11916. Our first step is to get underneath the vehicle here and locate the current manufacturers harness. On the top side of this, you will notice a bump out in the round connector, theres a lock on the back side of that connector, you will need to press and disconnect. Now I am going to go ahead and let the vehicle down and take a look at the outside part of the current connector. This piece is just a knock out, its where our new connector is going to mount its not an actual connector at this time.



Pollak Twist-In Trailer Connector Installation - 2009 GMC Sierra

Today on this 2009 GMC Sierra, we are going to be installing the Pollak 7-Pole Twist-In Style Connecter. Okay, we are here at the rear bumper of our Sierra, and if you look here, mounted is a dummy plug for our connector. We are going to twist this out and plug our new connector right in line to it. So to remove our knockout plug, if you go to the outside outboard side of it here, you can see that there is a little tab there. We press that in. We just want to go ahead and rotate the plug, and pull it right out of there. Attached on the back side is the connector for our tow package. If you look right on top here, there is a little release tab. Press that in, and go ahead and separate the two pieces. 0:44



Pollak Twist-In Trailer Connector Installation - 2009 GMC Sierra 1500

Today on this 2009 GMC Sierra 1500 series we are going to be installing the twist-in 7-pole connector part number PK11916. We are at the rear of the vehicle and we are just left of the license plate. Newer Silverados and Sierras have the built in hole for the 7-pole connector right in the bumper. What we have in place right now is a dummy plug so we are going to remove that and plug our connector in line. What we need to do to remove the dummy plug is if you look on the outboard side there is a little tab. Take a flat head screwdriver and press that in and take and turn the dummy plug counter clockwise and then pull it right out. 00:39



Trailer Wiring Harness Installation - 2006 GMC Sierra

Today we are going to install a 4-pole and 7-pole connector by Hoppy, part number 30955, on a 2006 GMC Sierra. This wiring connector that we are installing goes right into the factory connector. So I would start with lowering the spare tire for good visibility. You are going to want to take the existing wiring down so you can use this excess slack to run it to the bumper so you can mount the connector. Once you get the wiring harness taken down and the cap pulled off, then you are going to need to mount your mounting bracket to the bumper. Once you find a good location, mount the bracket with the self-tapping screws.