Fifth Wheel and Gooseneck Wiring Harness Installation - 2001 GMC Sierra

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How to Install a Fifth Wheel and Gooseneck Wiring Harness on a 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.

Starting here by the gray locking tab is the 1. Then the largest connector of all will the 2, which will be our white wire for ground. The color code we'll be using will be the same one that will match the end of our T-connector on the other side of our harness. Starting at the number 1 position right next to our white wire, is the red. We'll plug the red wire into the number 1 position. The wire will push, click, lock in place.

I'm going to follow that with our white wire in the number 2 position. The third position will be our blue wire. Fourth position is the green wire. Now before I install the remaining two wires here on the outside, I'm going to go ahead and install the center pin which will be yellow. Then after green on the outside will be black and then finally brown. Now with all the wires in place, we'll install the blue locking ring to secure them in position.

Now all our wires are locked in place. Before I plug the harness into the back of our new 7-pole connector, I'm going to apply some dielectric grease. Dielectric grease will help prevent corrosion that can build up over time. Then we'll go ahead and line up our locking tabs, connect the wiring and lock it in place. Next we'll mount the 7-blade connector here directly to the bed side using self tapping screws. Now with the connector mounted, we'll move back underneath the vehicle where we can route the wiring harness behind the bumper over to the manufacturer's 7-pole connectors. Once we have the wire routed into position, we'll need to remove the manufacturer's 7-pole connector harness from the back of the 7-pole connector.

We'll press on the locking tab and separate the two. We'll go ahead and apply some dielectric grease on the manufacturer's wiring and our new connector. The T-connector will plug in line with the manufacturer's wiring and then the socket connector will go into the back of the 7-pole connector. Now we'll go ahead and take some zip ties and secure our wiring as necessary. Next we'll go ahead and cut off the excess from the zip ties to clean up our install look. Now with all our wiring installed and secured, we're ready to hit the road. That does it for the install of the Pollack 5th Wheel and Gooseneck Trailer T-connector, part number PK11893-11932 on our 2001 GMC Sierra. .

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