This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.

This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind the seat version that will fit the 1500 SERIES (1/2 ton) crew cab and the Heavy Duty Series crew.THIS WILL ALSO FIT 2007 CLASSIC BODY GMC/ CHEVROLET SILVERADO ONLY. WE HAVE ANOTHER BOX THAT FITS THE NEW BODY STYLE 2007 TRUCK.

• Fits two 8 inch or two 10 inch subwoofers or Fits one 12 inch subwoofer
• Subs fire down underneath back seat
• MDF wood
• Carpeted in Charcoal Grey Carpet
• Air space = .65 cu ft per sub
• Mounting Depth = 6 1/4 inches
• NOTE:  YOU NEED TO REMOVE THE BAR UNDER THE REAR SEAT ON THE PASSENGER SIDE.  Please contact us if you need further instructions.  Seat will remain functional.

Subwoofer magnet must be less than 6 inches.

DOES NOT WORK WITH BUCKET SEATS, MUST HAVE FULL REAR BENCH OR 60/40 SPLIT SEATS.

THIS BOX WILL NOT FIT IF YOU DON'T HAVE A BRACE ON THE PASSENGER SIDE UNDER REAR SEAT.

Hole cutouts:

• Standard hole cutout diameter for 8s = 7 inches
• Standard hole cutout diameter for 10s = 9 1/8
• Standard hole cutout diameter for 12s = 11 1/8
• If you don't know the actual hole cutout diameter, choose the standard cutout below.
• If we don't have your actual diameter listed below, choose the standard cutout, then provide us with your sub model #.  No worries, we can look up the specs of your subs.