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Old 05-02-2019, 05:46 PM   #1 (permalink)
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5th wheel plug in bad harness

So I just got my 2019 3500. I ordered it with the UY2 wiring provisions. I did not order it with the gooseneck pre-installed or the plug in the bed pre-installed (Can't remember if that was even an option). I am having the B&W installed on Monday. The installed wanted another $200 to do the plug, and I figured I could handle the plug for that price. I have added the plug to my 01 and 02 in the past, but had to splice the wires, etc.
My question is, what harness needs to be ordered, through CURT or whoever, to plug in and add the 7-way plug to the inside of the bed of my truck.
Do I understand correctly that I will not need to actually splice wires? I will just need to get the correct harness and then find the bundled connection under the rear of the truck behind the spare and next to the hitch?
Found this on CURT website, but says it does not fit my 2019.

2019 GMC Sierra 3500 SLT Dually Dmax 4x4
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Old 05-02-2019, 07:41 PM   #2 (permalink)
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That fits your 2019 also. That is 100% plug and play electrically. You just need to drill the socket hole and mounting screw holes. And, remember, that kit is 7ft. If your going more than 7ft from the bumper plug, you'll have to cut and splice in extra wire on the kit.

Your UY2 option got you the back half of that kit. Difference is your UY2 has the wires blunt cut and taped up. To use what you've got, you'll need a bed socket that has bare wire screw type provisions.

Or, buy that kit and take the stock UY2 out from under the truck. Both are a Tee connection at the rear bumper plug.

Your UY2 harness is located, bundled up, between the bumper and the spare tire. Here https://gm.oemdtc.com/7951/5th-wheel...ado-gmc-sierra

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Last edited by heymccall; 05-02-2019 at 07:44 PM.
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