2007-2013 Gmc Sierra 2500Hd Extended Cab Truck Custom Single 10″ Sub Box New
2007-2013 GMC Sierra 2500HD Extended Cab Truck Single 10" Subwoofer Box Sub Enclosure. Adding bass to a vehicle can be a very complicated problem to tackle, especially when building a box! 2007-2013 GMC Sierra 2500HD Ext Cab Truck.