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7 Pin Electrical Plug for Trailer - Wire Size?

Trvlngnrs

By Trvlngnrs
in 2019-2025 Silverado & Sierra

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Trvlngnrs Enthusiast

Trvlngnrs

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My 2019 LT (All Star) has the tow package with the 220amp alternator.  

 

Does anyone know the wire gauge going to the trailer 7 pin electrical connection? I'm wondering if it is large enough to actually charge the batteries on a travel trailer, or if it's undersized and has is too much resistance. 

 

I remember 10 - 15 years ago, when I had an RV trailer, the general recommendations on RV forums was to upgrade the wire to get more current into the trailer's batteries.Is this still recommended?

 

Thanks guys,

Trvlngnrs

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