The Q Power GMC10DF is a custom-fit dual 10-inch down-firing subwoofer enclosure designed specifically for 1999–2006 Chevrolet Silverado and GMC Sierra Extended Cab trucks. Built to provide powerful bass while maintaining valuable cabin space, this enclosure mounts neatly under the rear seat and features a down-firing design that helps protect the subwoofers from cargo damage and daily wear. Constructed from durable MDF wood and wrapped in premium charcoal automotive carpet, the GMC10DF delivers deep, clean bass response with a factory-style appearance that blends seamlessly into the truck interior. Features & Highlights Custom-fit dual 10-inch subwoofer enclosure Designed for 1999–2006 Chevy Silverado & GMC Sierra Extended Cab trucks Under-seat down-firing enclosure design Protects subwoofers from cargo and impact damage Durable MDF wood construction Premium charcoal automotive carpet finish Space-saving OEM-style fitment Independent subwoofer chambers Designed for deep, clean low-frequency response Compatible with most shallow and standard-mount 10-inch subwoofers Extended Cab only — does NOT fit Crew Cab models Ideal for daily-driver and aftermarket truck audio systems Specifications Specification Details Enclosure Type Dual 10" Sealed Down-Firing Vehicle Fitment 1999–2006 Chevy Silverado / GMC Sierra Extended Cab Subwoofer Size Dual 10-Inch Configuration Under-Seat Down-Fire Material MDF Wood Construction Finish Premium Charcoal Carpet Air Space 0.95 cu. ft. per subwoofer Mounting Depth 5.5" Width 51.5" Height 15.25" Top Depth 7.25" Bottom Depth 9.5" Speaker Compatibility Most Shallow & Standard-Mount 10" Subwoofers Application Truck Audio Systems
