GMC Filter Sort Filters In Stock Availability In Stock Price $100-$500 (90) $500 and above (53) Brand Alpine (95) Harmony Audio (48) Sort SKU: A-Z SKU: Z-A Price: Low to High Price: High to Low Least Popular Most Popular Sort by: SKU Sale Price Popularity Compatible with 1999-2006 GMC Sierra Extended Cab Truck Alpine Type S S-W10D4... $326.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Alpine Type S S-W12D4... $324.99 Compatible with 1999-2006 GMC Sierra Extended Cab Truck Alpine Type S S-W12D4... $321.99 Compatible with 1988-1998 GMC Sierra Extended Cab Truck Alpine Type S S-W10D4... $316.99 Compatible with 2002-2009 GMC Envoy SUV Alpine Type S S-W12D4 Single 12"... $316.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Alpine Type S S-W10D4... $309.99 Compatible with 2001-2006 GMC Sierra 1500 Crew Truck Alpine Type S S-W10D4... $285.99 1999-2006 GMC Sierra Ext Cab Truck Alpine SWT-10S2 Single 10" Sub Box... $234.95 2014 - UP GMC Sierra Double Cab Alpine SWT-10S2 Single 10 Sub Box - Final 2 Ohm $229.95 1988-1998 GMC Sierra Ext Cab Truck Alpine SWT-10S2 Single 10" Sub Box... $224.95 2007-2013 GMC Sierra Extended Cab Truck Alpine SWT-10S2 Single 10 Sub Box... $214.95 2014 - UP GMC Sierra Crew Cab Alpine SWT-10S2 Single 10 Sub Box - Final 2 Ohm $209.95 2014 - UP GMC Sierra Double Cab Alpine Type S S-W12D4 Single 12 Sub Box New... $209.95 01-06 GMC Sierra 1500 Crew Truck Alpine SWT-10S2 Ported 10" Sub Box Enclosure... $204.95 1988-1998 GMC Sierra Ext Cab Truck Alpine Type S S-W12D4 Single 12" Sub Box... $199.95 2002-2009 GMC Envoy SUV Alpine Type S S-W12D4 Single 12" Custom Sub Box... $194.95 2014 - UP GMC Sierra Crew Cab Alpine Type S S-W12D4 Single 12 Sub Box... $194.95 2007-2013 GMC Sierra Extended Cab Truck Alpine Type S S-W12D4 Single 12 Sub... $189.95 1999-2006 GMC Sierra Ext Cab Truck Alpine Type S S-W10D4 Single 10" Sub Box... $184.95 1999-2006 GMC Sierra Ext Cab Truck Alpine Type S S-W12D4 Single 12" Sub Box... $179.95 1988-1998 GMC Sierra Ext Cab Truck Alpine Type S S-W10D4 Single 10" Sub Box... $174.95 2007-2013 GMC Sierra Extended Cab Truck Alpine Type S S-W10D4 Single 10 Sub... $169.95 01-06 GMC Sierra 1500 Crew Truck Alpine Type S S-W10D4 Ported 10" Sub Box... $164.95 123456