SoundBox
SoundBox Silverado/Sierra Crew Cab Dual 12" Subwoofer Enclosure Box 2008-2013
Harmony Audio
Harmony Audio F124 Dual 12" Sub Box Enclosure Compatible with Chevy Silverado Crew Cab 2007 2008 2009 2010 2011 2012 2013
Q Power
QPower QBomb Easy Set Dual Ported 12 inch Subwoofers Box Enclosure Car Audio with Bedliner Spray for GMC Chevy Crew Cab 2007-2013
Q Power
Q Power QBGMC1220144DR Dual 12" Subwoofer Enclosure Box for 2014-2016 Chevy Silverado and GMC Sierra Crew Cab Trucks