Installation Time
(approx) 30 Minutes
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
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$239.00 each
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Features, Description, Q&A, Specs & Installation
Custom Audio Upgrade. The King Boxes 12-Inch Dual Sealed Subwoofer Box is purpose-built to elevate your in-cabin audio experience. Designed specifically to fit the contours of the 2003-2006 Sierra 2500 HD Crew Cab, this enclosure delivers powerful, distortion-free bass by housing two 12-inch subwoofers in sealed chambers. With a 5-inch mounting depth and 0.6 cubic feet per chamber, it's optimized for performance while conserving space.
Construction and Appearance. Featuring a charcoal sprayed finish, this subwoofer box blends seamlessly into your truck's interior. It's constructed from high-quality, durable materials that offer both vibration resistance and long-term reliability. The sealed design enhances low-frequency response and improves subwoofer efficiency.
Installation. This subwoofer box is engineered for a precise fit in the rear cabin area of Crew Cab models, making installation straightforward. No modifications are required, and all mounting steps are simplified for a plug-and-play experience.
Warranty. Backed by a one-year limited warranty, this product ensures coverage against manufacturing defects or material issues.
Application. This King Boxes 12-Inch Dual Sealed Subwoofer Box fits 2003-2006 Sierra 2500 HD Crew Cab models.
King Boxes AK-GMC03-12
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation Info
Installation Time
(approx) 30 Minutes
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
What's in the Box