Chevrolet Silverado GMC Sierra Extended Cab (Double Cab) 1999 - 2006 (Dual 12")

Fits: 1999-2006 Extended Cab & 2007 "Classic"

Maximum Bass for the Classic Body Style.

Bring modern, ground-shaking bass to your classic 1999–2006 GM truck. This Dual 12" Sealed Enclosure is custom-molded to fit snugly under the rear bench seat of the Silverado and Sierra Extended Cab models (the trucks with the rear-opening "suicide" doors).

Built for longevity and abuse, this enclosure features a premium protective spray liner finish. Unlike standard carpet that traps dirt, absorbs moisture, and frays over time, this armor coating provides a water-resistant, tactical shell that is easy to clean and tough as nails.

Why This Box?

• Precision Under-Seat Fit: engineered specifically for the GMT800 platform (99-06), this box contours to the floor pan, allowing the rear seat to fold down and lock into position without modification.

• Armor-Coated Durability: The professional-grade bedliner spray finish protects the wood from moisture and damage, making it perfect for work trucks or daily drivers.

• Down-Firing Performance: The subs fire downward into the floor, utilizing the cabin boundaries to load the bass for louder output while keeping the woofer cones safe from cargo and passengers' feet.

• Dual 12" Capacity: Designed to squeeze the maximum amount of bass possible into this truck cab, accommodating two 12-inch subwoofers for deep, impactful sound.

Technical Specifications