Amazon.com: Compatible with 1999 2000 2001 2002 2003 2004 2005 2006 Chevy Silverado Ext Cab Truck Alpine S-W10D4 Type S Car Audio Subwoofer Custom Single 10" Sub Box Enclosure Package : Electronics
Amazon.com: Compatible with 2001 2002 2003 2004 2005 2006 Chevy Silverado HD Crew Truck Alpine S-W12D2 Type S Car Audio Subwoofers Custom Dual 12" Sub Box Enclosure Package : Electronics
BLACK 12" DUAL PORTED SUB BOX, FITS 07-18 CHEVY SILVERADO EXT-CAB
Discontinued Obsolete SKU | MTX - Serious About Sound®
1999-2006 Chevy Silverado/GMC Sierra Extended Cab Dual 12" Sub Box | Skar Audio
Chevy Silverado Crew Cab Sub Box GMC Sierra Crew Cab Sub Box Sub
Amazon.com: Compatible with 1999 2000 2001 2002 2003 2004 2005 2006 Chevy Silverado Ext Cab Truck Alpine S-W12D2 Type S Car Audio Subwoofers Custom Dual 12" Sub Box Enclosure Package : Electronics
Amazon.com: 1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box : Health & Household