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Old 03-30-2021, 04:39 PM   #11
LS short box
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Join Date: Jun 2015
Location: Carlos MN
Posts: 1,951
Re: Where to add sound deadening mat? For adding door speakers and under carpet

I used some Dyna Mat "like" inside the doors. My doors had some GM spray on under coating inside the door. It was rock hard and chipped off with a little effort.
Here's a pic of my cab insulation.
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