RWDMLD18

GMC Canyon tail light wiring

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My 2006 GMC Canyon truck is wired for a trailer. If a long wiring harness is plugged in to the trailer adapter at the tow hitch and than plugged in to the RV tow light adapter, will the truck tail light work?

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The truck is wired for a trailer. If a long wiring harness is plug in to the trailer adapter at the tow hitch and than plug into the RV tow light adapter will the truck tail light work?

In a word, NO. You would be BACKFEEDING the Canyon's electrical system.

If there is room in the tail light lenses, you can install an additional socket/light that is fed from the RV, OR

You can buy a "diode-based" adapter that would allow you to cut into the Canyon's tail light wiring (may void warranty) to use the present bulbs, OR

Use separate magnetic-base lights that are totally separate from your Canyon.

Brett Wolfe

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Thanks, Brett. I thought so, but I had to ask the question. I do have the harness kit that has the additional bulbs. I will install per the directions.

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