Installation Time
(approx) 15 Minutes
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
FREE 1 to 3-Day Delivery on Orders $149+ Details
$279.99 each
Saved - View your saved items
We're sorry. We couldn't save this product at this time.
or use
Features, Description, Reviews, Q&A, Specs & Installation
Deep, Articulate Bass in a Low-Profile Box. The King Boxes 12-Inch Dual Downfire sealed enclosure leverages larger drivers to reproduce deep, tight bass that fills your truck’s cabin without requiring a bulky cabinet. Downward-firing subwoofers project low frequencies into the floor, creating an immersive listening experience that integrates with factory audio. Designed for Silverado extended-cab models, this unit maintains under-seat clearance and safeguards driver visibility and cargo space while delivering concert-quality low end.
Durable Build and Discrete Styling. Constructed from precision-cut MDF panels, glued and stapled for maximum rigidity, and reinforced with internal bracing, this box minimizes resonance for distortion-free playback. The charcoal spray finish matches GM interior trims and resists wear from cargo or gear. A flush-mount terminal cup streamlines wiring, and a one-year warranty covers any manufacturing defects, ensuring long-term reliability.
Installation. This product secures under the rear seat using OEM mounting locations—connect speaker wiring to the terminal cup and fasten with supplied hardware.
Application. This King Boxes 12-Inch Dual Downfire Sealed Subwoofer Box; Charcoal Sprayed Finish fits 2001-2006 Silverado 2500 HD Extended Cab Models.
King Boxes AK-GMC35-12
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation Info
Installation Time
(approx) 15 Minutes
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
What's in the Box