Carxtc Speaker Connection Plugs for Replacing Factory Rear Door 6.75 Inch Speakers. Fits GMC Sierra / Sierra Denali 2008 - 2013 Extended CabA Pair of Speaker plug Adapaters for Installing a New Set of New Rear Door 6.75 Speakers in a GMC Sierra / Sierra Denali 2008 2013 2009 2010 2011 2012 2013 08 09 10 11 12 13
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