Single 12 Sub Enclosure Box for Gmc Sierra 3500Hd Ext Cab Truck 07 08 09 10 11 12 13

Single 12 sub enclosure box designed for Gmc Sierra 3500Hd Ext Cab trucks from 07 08 09 10 11 12 13. This enclosure provides a dedicated housing for one 12 subwoofer tailored to the Ext Cab configuration of the Sierra 3500Hd. Ideal for adding a single 12 sub to your Gmc Sierra 3500Hd Ext Cab (07 08 09 10 11 12 13).