Q Power 2 Hole 2007-2013 GM/Chevy Crew Cab 10" Ported Subwoofer Box | QBGMC07210 2 hole 10 inch ported subwoofer enclosure for GM/Chevy crew cab Fits model years 2007 2013 Up firing design Fits under seat For 10 inch subwoofers, 5.5 inch mounting depth