Home > Car Audio > Custom Sub Boxes > GMC Sierra 2500HD Extended Cab Truck 2007-2013 Underseat Single 12" Subwoofer Box Sub Enclosure

GMC Sierra 2500HD Extended Cab Truck 2007-2013 Underseat Single 12" Subwoofer Box Sub Enclosure

List Price:  $212.00
Price:  $71.99
You Save:  $140.01 (66%)
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GMC Sierra 2500HD Extended Cab Truck 2007-2013 Single 12" Sub Box

The GM1X12-EXCAB07+ sub enclosure is designed specifically for the 2007-2013 GMC Sierra 2500HD Extended Cab Truck. The sub box houses a single 12" subwoofer and is compatible with a wide range of subwoofer brands and models. The box is constructed from high quality MDF wood and features a black carpet finish. The enclosure installs under the rear driver side seat and the subwoofer fires downward.


  • GMC Sierra 2500HD Extended Cab Truck 2007-2013 Underseat Single 12" Subwoofer Box Sub Enclosure
  • SKU: GM1X12-EXCAB07_4
  • Features:

    • 2007-2013 GMC Sierra 2500HD Extended Cab Truck Single 12" Subwoofer Box Sub Enclosure
      • Mounting Depth: 5-3/4"
      • Air Space: 0.65 Cubic Feet
      • Sealed Enclosure
    • Constructed with High Quality MDF
    • High Quality Spring Loaded Terminal Cup (Bare Wire 'up to 10GA')
    • High Quality Black Carpet
    • Fits under rear seat on Driver side only
    • Model trucks with low transmission hump may require spacers to hold the box up
    • Will fit full bench and 60/40 bench seat trucks

    This box fits:

    • 2007-2013 Chevy Silverado 1500 Ext Cab Truck
    • 2007-2013 GMC Sierra 1500 Ext Cab Truck
    • 2007-2013 Chevy Silverado 2500HD Ext Cab Truck
    • 2007-2013 GMC Sierra 2500HD Ext Cab Truck
    • 2007-2013 Chevy Silverado 3500HD Ext Cab Truck
    • 2007-2013 GMC Sierra 3500HD Ext Cab Truck
  • This item is New
  • 30-Day Half Price Car Audio Warranty
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Return Policy
Due to the size of this item it cannot be returned for a refund. If the box is damaged in-transit we will replace it. Click here for more information on damaged items.