The FOX Acoustics GM-CC-212-V-19 is a premium dual 12-inch vented under-seat subwoofer enclosure engineered specifically for 2019+ Chevrolet Silverado and GMC Sierra Crew Cab 1500 trucks. Designed for serious low-frequency output while maintaining factory-style interior integration, this enclosure allows full-size 12-inch subwoofers to fit cleanly under the rear seat with strong deep-bass performance and high-output ported tuning. Main Features Designed specifically for 2019+ Silverado/Sierra Crew Cab 1500 Dual 12-inch vented enclosure Ported design tuned for deep bass response Supports full-depth 12-inch subwoofers Two-piece enclosure design Heavy-duty MDF construction Black spray bedliner coating Under-seat OEM-style fitment High-output 33Hz tuning frequency Large internal air volume for strong low-end extension Built for SQL and high-output daily-driver systems Specs Specification Details Vehicle Fitment 2019+ Silverado/Sierra 1500 Crew Cab Enclosure Type Dual 12" Vented Subwoofer Size Dual 12" Mounting Depth 7.5" Max Magnet Diameter 7.5" Internal Airspace 1.8 ft³ per sub Port Tuning 33Hz Mounting Hole Diameter 11.15" Baffle-to-Floor Clearance 2.25" Construction MDF w/ Spray Bedliner Coating Approx. Shipping Weight ~45–65 lbs Important Compatibility Notes The GM-CC-212-V-19: ONLY fits 2019+ Silverado/Sierra Crew Cab trucks Does NOT fit Double Cab or Extended Cab models Does NOT fit 2018 and older trucks Requires removal of the factory under-seat storage tray Uses a two-piece enclosure layout for installation