Looking for aftermarket parts to modify or upgrade your 2015 GMC Sierra 3500 HD with truck boxes & storage? At Tunersports.com we carry a huge selection of the top name brand performance truck boxes & storage parts and accessories for your Sierra 3500 HD.
Whether you have a 2015 GMC Sierra 3500 HD in Base to SLT trim we have you covered. We have 3 truck boxes & storage available to mod your Sierra 3500 HD. All parts have free shipping to the Continental US 48 States.
 IN STOCK 92120The BAKBox2 is a toolbox for the back of your truck that is designed to integrate with a BAK truck bed cover. Unlike a regular toolbox, the BAKBox2 has a wealth of design innovation built into it that sets it apart from any other toolbox The BAKBox2 can conveniently fold away when not in use, giving... BAK 14-18 Chevy Silverado (Fits All Models) BAK BOX 2 2014-2023 GMC Sierra 3500 HD Denali / SLE / SLT 2015-2021 GMC Sierra 3500 HD Base $379.99 |
 IN STOCK SC100DSwingCase by UnderCover is the most innovative and versatile truck storage box ever made. Built to last from lightweight, high-impact ABS plastic; the tough, weatherproof, SwingCase is custom fitted for your truck. The SwingCase is affordable, too. In fact, you can purchase two SwingCases for less t... UnderCover 07-18 Chevy Silverado 1500 (19 Legacy) Drivers Side Swing Case - Black Smooth 2007-2019 GMC Sierra 3500 HD SLE / SLT 2011-2019 GMC Sierra 3500 HD Denali 2015-2019 GMC Sierra 3500 HD Base $239.99 |
 IN STOCK SC100PSwingCase by UnderCover is the most innovative and versatile truck storage box ever made. Built to last from lightweight, high-impact ABS plastic; the tough, weatherproof, SwingCase is custom fitted for your truck. The SwingCase is affordable, too. In fact, you can purchase two SwingCases for less t... UnderCover 07-18 Chevy Silverado 1500 (19 Legacy) Passengers Side Swing Case - Black Smooth 2007-2019 GMC Sierra 3500 HD SLE / SLT 2011-2019 GMC Sierra 3500 HD Denali 2015-2019 GMC Sierra 3500 HD Base $239.99 |