![Amazon.com: American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 2007-2013 Dual 12" Subwoofer Sub Box Speaker Enclosure : Electronics Amazon.com: American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 2007-2013 Dual 12" Subwoofer Sub Box Speaker Enclosure : Electronics](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61NHM+-KopL.jpg)
Amazon.com: American Sound Connection Compatible with Chevy Silverado or GMC Sierra Full Size Extended Cab Truck 2007-2013 Dual 12" Subwoofer Sub Box Speaker Enclosure : Electronics
![Amazon.com: American Sound Connection ASC 2X12GMNEW Sub Box Sealed Fits Chevy Silverado Sierra 1999-06 Ext Cab Truck Dual 12 Subwoofer Enclosure Custom GMC Chevrolet : Electronics Amazon.com: American Sound Connection ASC 2X12GMNEW Sub Box Sealed Fits Chevy Silverado Sierra 1999-06 Ext Cab Truck Dual 12 Subwoofer Enclosure Custom GMC Chevrolet : Electronics](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61dxCXLRRnL.jpg)
Amazon.com: American Sound Connection ASC 2X12GMNEW Sub Box Sealed Fits Chevy Silverado Sierra 1999-06 Ext Cab Truck Dual 12 Subwoofer Enclosure Custom GMC Chevrolet : Electronics
![Finished custom sub box build for my 2006 GMC Sierra crew cab. MDF Trim ring around sub I added for cosmetic appeal, haven't decided if I like the color. Test fit and Finished custom sub box build for my 2006 GMC Sierra crew cab. MDF Trim ring around sub I added for cosmetic appeal, haven't decided if I like the color. Test fit and](https://preview.redd.it/8yttfmhwq2x51.jpg?width=640&crop=smart&auto=webp&s=0908aa5f19b3e6829fff9369ebc4970ccf61ed48)
Finished custom sub box build for my 2006 GMC Sierra crew cab. MDF Trim ring around sub I added for cosmetic appeal, haven't decided if I like the color. Test fit and
![Here's some pics of the final product from the GMC Sierrabuild earlier this week. This box sounded amazing! 🔈… | Truck audio system, Truck audio, Car audio systems Here's some pics of the final product from the GMC Sierrabuild earlier this week. This box sounded amazing! 🔈… | Truck audio system, Truck audio, Car audio systems](https://i.pinimg.com/originals/87/30/38/873038a6086a70cd82b540f2873fc33f.jpg)