Jcupit77 Posted February 22, 2016 Report Share Posted February 22, 2016 I am trying to build a box under the back seat of my 2011 silverado for 2 sundown sa8's does anyone have any box plans for my truck and the speakers I lifted the back seats 2 inches to get a little more space any help will be appreciated thanks Link to comment Share on other sites More sharing options...
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