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Amazon.com: Atrend Bbox Dual 10 Inch Subwoofer Sealed Enclosure - Fits 1999- 2006 Heavy Duty Chevrolet/GMC Crew Cab - Car Subwoofer Boxes & Enclosures - Subwoofer Box Improves Audio Quality, Sound and Bass - Charcoal : Electronics
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Amazon.com: Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10" Subwoofer Kicker Square Sub Box Speaker Enclosure : Electronics
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Dual 12" Loaded Subwoofer Enclosure for 1999-2006 Chevrolet Silverado/GMC Sierra Extended Cab Trucks | Skar Audio
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