Rockville
Rockville Dual 10" Ported Subwoofer Sub Box Enclosure for 2004-2006 GMC/Chevy Crew Cab
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
Atrend
Atrend Bbox Dual 10 Inch Subwoofer Sealed Enclosure - Fits 1999-2006 Heavy Duty Chevrolet/GMC Crew Cab - Car Subwoofer Boxes & Enclosures - Subwoofer Box Improves Audio Quality, Sound and Bass - Charcoal
Atrend
Atrend Bbox A184-12CP Dual 12" Sealed Carpeted Subwoofer Enclosure - Fits 2007 - 2020 Chevrolet/GMC Silverado/Sierra Crew Cab, Charcoal