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How To Add a 4-Way to a 2019 GMC Sierra 3500 To Use with Tailgate Light Bar


Trying to connect the opt7 tail light bar to my truck that has a 4 pin connector. What is the correct t style that will connect to my existing wiring harness and this 4 pin. Like the CURT 56584  but it says not for my truck. Thanks ahead of time.


Expert Reply:

In order to add a 4-way trailer connector while also retaining the 7-way trailer connector on a 2019 GMC Sierra 3500 you can use the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118384 which offers plug-n-play installation. This will then allow you to plug in a tailgate light bar like the Putco Red Blade LED Tailgate Light Bar part # P92010-60 and still tow a trailer if needed.

expert reply by:
Conner L

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