Filter Filters GMC Remove All Filters Price Under $50 (10) $100-$500 (64) Condition New (74) Brand Harmony Audio (63) Metra (11) Model Sierra (54) Envoy (9) Sonoma (2) Yukon Denali (2) Canyon (1) S-15 Jimmy (1) S-15 Sonoma (1) Safari (1) Savana (1) Show More Suburban (1) Terrain (1) Radio Size Single DIN (4) Single DIN,ISO Mount (2) Kit Material Plastic (6) Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony F104 Single... $254.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony F124 Single... $269.99 2007-2013 GMC Sierra Extended Cab Truck Harmony F124 Single 12 Sub Box &... $309.99 1988-1998 GMC Sierra Ext Cab Truck Harmony F104 Single 10" Sub Box & CXA400.1 $294.99 2007-2013 GMC Sierra Extended Cab Truck Harmony F104 Single 10 Sub Box &... $294.99 2007-2013 GMC Sierra Extended Cab Truck Harmony F104 Single 10 Sub Box Enclosure $154.99 2002-2009 GMC Envoy SUV Harmony R124 Single 12" Custom Sub Box Enclosure New $133.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony A122 Single... $315.99 2007-2013 GMC Sierra Extended Cab Truck Harmony A122 Single 12 Sub Box Enclosure $160.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony R124 Single... $245.99 2007-2013 GMC Sierra Extended Cab Truck Harmony R104 Single 10 Sub Box Enclosure $136.99 2002-2009 GMC Envoy SUV Harmony R124 Single 12" Custom Sub Box & CXA400.1 Amp $275.99 2007-2013 GMC Sierra Extended Cab Truck Harmony R124 Single 12 Sub Box &... $285.99 2007-2013 GMC Sierra Extended Cab Truck Harmony A102 Single 10 Sub Box Enclosure $149.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony A122 Single... $401.99 2007-2013 GMC Sierra Extended Cab Truck Harmony R104 Single 10" Loaded Sub... $281.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony R104 Single... $236.99 Compatible with 1999-2006 GMC Sierra Extended Cab Truck Harmony F124 Single... $269.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony A102 Single... $399.99 Compatible with 2002-2009 GMC Envoy SUV Harmony F124 Single 12" Custom Sub... $259.99 1999-2006 GMC Sierra Ext Cab Truck Harmony R124 Single 12" Sub Box Enclosure $140.99 Compatible with 2002-2009 GMC Envoy SUV Harmony R124 Single 12" Custom Sub... $235.99 Compatible with 1988-1998 GMC Sierra Extended Cab Truck Harmony F104 Single... $254.99 Compatible with 2007-2013 GMC Sierra Extended Cab Truck Harmony A102 Single... $324.99 1234