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Iceworm's avatar
Iceworm
Explorer
Feb 29, 2020

Locating trailer hot wire underhood source 2017 GM

I am looking for the hot trailer wire source under the hood of my 2017 GM Sierra 3500. It is always hot at the trailer plugin. I would like to run the power wire via a constant duty solenoid powered...
opnspaces's avatar
opnspaces
Navigator II
Feb 29, 2020
my 2001 Suburban has at least 4 separate trailer wiring fuses and the labeling stinks. So I imagine your 2017 has at least that many. And all labeled in some strange language.

In the end I just went to the bumper and shorted the 12v power to ground and blew the fuse. Even then it took a while to find the blown fuse because it was a physically larger 30a fuse. And not one of the little mini fuses. Oh and it was under the hood in the fuse and relay box.

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