OBCON Dual 10" Chevy 1500 Crew Cab '00-'07 Speaker Box (behind the seat) With Labyrinth Power Port Fits years 2000 thru 2007 classic (behind the seat) Silverado/Sierra 1500 Crew Cabs Will not fit new body style for 2007-2011 models or HD models Holds 2 x 10 subs with 5 3/4" mounting depth Labyrinth slot vent design Premium MDF with "Tri-lock" joint construction