Dual Sub Box (under rear seat) 2001-2006 Silverado CREW HD - Sound Off Audio, Inc.
Ported sub box 2007-2013 Chevy Silverado Extended Cab truck
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
99-06 GM Regular Cab Subwoofer Boxes
Discontinued Obsolete SKU | MTX - Serious About Sound®
Amazon.com: American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10" Subwoofer Sub Box Speaker Enclosure : Electronics
Amazon.com: 1999-2006 Silverado/Sierra Extended Cab Dual 10 Downfire with Amp Space Sub Box : Health & Household
CHEVROLET EXTENDED CAB SUB BOX 1999-2006 - YouTube
Discontinued Obsolete SKU | MTX - Serious About Sound®
Amazon.com: American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10" Subwoofer Sub Box Speaker Enclosure : Electronics
Amazon.com: American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10" Subwoofer Sub Box Speaker Enclosure : Electronics
Chevrolet Silverado 2 X 10" Subwoofer Loaded Enclosure With Vinyl Fini
Chevy Silverado Standard Cab Sub Box GMC Sierra Standard Cab Sub
Custom Level 5 Front Firing Subwoofer Enclosure for the 2019-2024 GMC – Sounds Good Stereo Online
2000-2010 CHEVROLET TAHOE and GMC YUKON SINGLE SUBWOOFER BOX - SSA STORE
Amazon.com: American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 1999-2006 Dual 10" Subwoofer Sub Box Speaker Enclosure : Electronics