Filter Filters Envoy Remove All Filters Price $100-$500 (9) Condition New (9) Brand Harmony Audio (9) Make GMC (9) 2002-2009 GMC Envoy SUV Harmony F124 Single 12" Custom Sub Box Enclosure New $159.99 2002-2009 GMC Envoy SUV Harmony R124 Single 12" Custom Sub Box & CXA400.1 Amp $275.99 2002-2009 GMC Envoy SUV Harmony R124 Single 12" Custom Sub Box Enclosure New $133.99 2002-2009 GMC Envoy SUV Harmony A122 Single 12" Custom Sub Box Enclosure New $145.99 2002-2009 GMC Envoy SUV Harmony F124 Single 12" Custom Sub Box & CXA400.1 Amp $299.99 Compatible with 2002-2009 GMC Envoy SUV Harmony A122 Single 12" Custom Sub... $391.99 Compatible with 2002-2009 GMC Envoy SUV Harmony R124 Single 12" Custom Sub... $235.99 Compatible with 2002-2009 GMC Envoy SUV Harmony A122 Single 12" Custom Sub... $305.99 Compatible with 2002-2009 GMC Envoy SUV Harmony F124 Single 12" Custom Sub... $259.99