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Old 07-11-2020, 12:02 AM   #3
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Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,448
Re: Opening under dash

If it is blowing that cold I would venture to say its there to prevent the unit from freezing up.

Common sense, SWAG, or corrected error on part of GM.
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