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Iceworm's avatar
Iceworm
Explorer
Feb 28, 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...
KD4UPL's avatar
KD4UPL
Explorer II
Feb 29, 2020
Unless they've changed from earlier models it will be one of the studs on the under-hood fuse block. I don't remember which one. The fuses are labeled stud #1 and Stud #2 I think. It's either a 40A or 30A fuse.

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