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What Vehicle Trailer Wiring Kit To Add 7-Way Connector To GMC W3500


Hello, I. Have a GMC W3500. And I need to wire the truck to tow a trailer, the truck doesnt have any wiring/plugs at the moment. Do you have a kit whit the 7 pole that can I use. I will attach a picture of the trailer plug that I have


Helpful Expert Reply:

To install a 7-way connector on your GMC W3500 to fit the 7-way connector you referenced in your picture you will first need to install a 4-pole wiring harness such as the Tekonsha Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness # 119190 on your vehicle. I recommend adding the Tekonsha ModuLite Installation Wiring Kit # 118151 which includes the wire needed to run the power wire to your vehicle's battery, connectors, and a fuse holder to protect your wiring. I attached the video review for the Tekonsha Upgraded Heavy Duty ModuLite Vehicle Harness # 119190 for you take a look at.

In addition you will need the etrailer Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat # ETBC7 which will convert your 4-pole connector to a 7-way and 4-pole connector.

If you can give me the year of your vehicle I can check to see if we offer a custom fit 4-pole vehicle harness that will allow for plug and play installation instead of splicing into your vehicles harness.

helpful expert reply by:
Samuel C

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