We have the highest quality subwoofer enclosures available for your GMC Sierra (Full Size Truck) You can order your sub box by itself or part of a complete audio transformation (get unbelievable deals right now on subwoofer + amplifier + box packages).

Sierra (Full Sized Trucks)

See details Chevrolet Silverado/GMC Sierra Extended Cab Quad Subwoofer Enclosure 1999-2006 SKU: SKU199-GMEC9905QUAD Custom Subwoofer Box (Quad DownFire)   Market price: $199.00 Our price: $179.00, save 10% See details Custom GMC Full Size Extended Cab Paired Subwoofer Enclosures (1999-2005) SKU: 11163-GMEC9912.2PR Custom Subwoofer Box (Dual Downfire)   Our price: $159.00 See details Custom GMC Full Size Extended Cab Subwoofer Enclosure (1988-1998) SKU: 11160-GMEC88-98DF Custom Subwoofer Box (Dual Downfire)   Market price: $179.00 Our price: $154.00, save 13% See details Custom GMC Full-Size Standard Cab Subwoofer Enclosure (All Years) SKU: 11150-CHEVYSTD Custom Subwoofer Box (Dual Front Fire)   Market price: $129.00 Our price: $124.00, save 3% See details Custom GMC X-Cab Single Subwoofer Enclosure (1999-2004) SKU: 11010-GMEC9910SINGLE DF Custom Subwoofer Box (Single Downfire)   Our price: $84.00

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