DEEP Sub box- 2007-2013 Chevy Silverado/GM Sierra Crew Dual Box - Sound Off Audio, Inc.
2014 Silverado Dual 10" Ported subwoofer box
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
Chevy Silverado Car Stereo Installation Under Seat Sub Box with JL Audio | Explicit Customs
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Custom Level 5 Front Firing Subwoofer Enclosure for the 2019-2024 GMC – Sounds Good Stereo Online
Amazon.com: Compatible with 2014 2015 2016 2017 2018 2019 Chevy Silverado Crew Cab Alpine S-W12D4 Type S Car Audio Subwoofer Custom Single 12" Sub Box Enclosure Package : Electronics
Amazon.com: 2007-2013 Chevy Silverado/GMC Sierra Crew Cab Quad 8 Front Fire Subwoofer Box : Electronics
2007-2013 Chevy Silverado 1500 Extended Cab Truck Single 10" Sub Box Enclosure - Walmart.com