Installation Time
(approx) 15 Minutes
Difficulty Level:
Simple installation for anyone.
Installation Guides
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King Boxes 12-Inch Dual Downfire Sealed Subwoofer Box; Charcoal Sprayed Finish
(99-06 Silverado 1500 Extended Cab
Find parts that fit my vehicle Item S205575
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features
- King Boxes 12-Inch Dual Downfire Sealed Subwoofer Box; Charcoal Sprayed Finish
- Powerful 12-Inch Dual-Driver Design
- Charcoal Spray Finish for OEM Aesthetics
- Flush-Mount Terminal Cup for Neat Connections
- Sturdy MDF Construction with Bracing
- One-Year Limited Warranty on Craftsmanship
- Fits 1999–2006 Silverado 1500 Extended Cab Models
Description
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 1999–2006 Silverado 1500 Extended Cab Models.
King Boxes AK-GMC35-12
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Install Details & What's in the Box
Installation Info
What's in the Box
- (1) Dual-Subwoofer Enclosure
- (2) Subwoofers
- (1) Foam Gasket
- (1) Speaker Cable
4.9
Customer Reviews (7)
Questions & Answers
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Will It Fit My Silverado 1500
- 4.3L V6 - 99, 00, 01, 02, 03, 04, 05, 06
- 4.8L V8 - 99, 00, 01, 02, 03, 04, 05, 06
- 5.3L V8 - 99, 00, 01, 02, 03, 04, 05, 06
- 6.0L V8 - 03, 04, 05, 06
