Filter Filters Avalanche Remove All Filters Price $100-$500 (25) $500 and above (4) Condition New (29) Brand Harmony Audio (29) Make Chevy (29) 2002-2013 Chevy Avalanche Underseat Harmony A102 Dual 10" Sub Box Enclosure New $249.99 Compatible with 2002-2013 Chevy Avalanche Harmony F104 Dual 10" Sub Box... $465.99 Compatible with 2002-2013 Chevy Avalanche Harmony F124 Dual 12" Sub Box... $514.99 2002-2013 Chevy Avalanche Underseat Harmony R124 Dual 12" Rhino Coated Sub... $256.99 2002-2013 Chevy Avalanche Behind Seat Harmony F124 Dual 12" Sub Box Enclosure $259.99 12