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Installing a Viper Alarm, JL Audio, and a Custom Subwoofer Enclosure in our Standard Cab Silverado
JL Audio Stealthbox® (2003-2005, Dark charcoal) Driver side custom-fit enclosure with 10" W6v2 subwoofer Fits 1999-2005 Chevrolet Silverado / GMC Sierra Extended Cab (with full-bench rear seat) at Crutchfield
Dual 8" subwoofer box ported for 2003-2006 Chevy Silverado GMC Sierra Crew Cab | eBay
Amazon.com: American Sound Connection ASC 2X12GMNEW Sub Box Sealed Fits Chevy Silverado Sierra 1999-06 Ext Cab Truck Dual 12 Subwoofer Enclosure Custom GMC Chevrolet : Electronics