Just ran this by Chevy Dealer Mechanic I know and he said same thing. Grommet seal where wire loom comes through most likely. Will await a warmer, dry day.
So are we talking about the oval entrance gasket a little to the right of the middle at top with all the wires? I didn't find anything in it in the way of debris. I silicone it but a little snow this morning and it's leaking again.
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