DEEP Sub box- 2007-2013 Chevy Silverado/GM Sierra Crew Dual Box - Sound Off Audio, Inc.
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
Custom Level 5 Front Firing Subwoofer Enclosure for the 2019-2024 GMC – Sounds Good Stereo Online
Amazon.com: 2001-2006 Chevy Silverado/GMC Sierra HD Crew Cab Dual 10 Downfire Subwoofer Box : Electronics
Chevy Silverado / GMC Sierra Extended Cab 99-06 Dual Subwoofer Box with Amp Rack
Amazon.com: Liphontcta 99-06 Chevy Silverado/GMC Sierra Regular Cab Dual 12 Subwoofer Box with Amp Space : Electronics
2019-Up Chevy Silverado/GMC Sierra Crew Cab Quad 8" Ported Sub Box | Skar Audio