Filter Filters New Avalanche Remove All Filters Price $100-$500 (18) $500 and above (1) Brand Harmony Audio (19) Make Chevy (19) 2002-2013 Chevy Avalanche Underseat Harmony R124 Dual 12" Sub Box & CXA400.1 Amp $341.99 2002-2013 Chevy Avalanche Underseat Harmony F104 Dual 10" Sub Box Enclosure New $239.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony A102 Dual 10" Sub... $479.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony R124 Dual 12" Sub... $351.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony A122 Dual 12" Sub... $496.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony F124 Dual 12" Sub... $526.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony A122 Dual 12" Sub... $410.99 2002-2013 Chevy Avalanche Underseat Harmony R104 Dual 10" Sub Box & CXA400.1 Amp $323.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony F124 Dual 12" Sub... $440.99 Compatible with 2002-2013 Chevy Avalanche Harmony F104 Dual 10" Sub Box... $465.99 2002-2013 Chevy Avalanche Underseat Harmony R104 Dual 10" Sub Box Enclosure New $225.99 2002-2013 Chevy Avalanche Underseat Harmony R124 Dual 12" Sub Box Enclosure New $231.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony R104 Dual 10" Sub... $310.99 2002-2013 Chevy Avalanche Underseat Harmony A122 Dual 12" Sub Box Enclosure New $255.99 2002-2013 Chevy Avalanche Underseat Harmony A102 Dual 10" Sub Box Enclosure New $249.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony F104 Dual 10" Sub... $494.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony A102 Dual 10" Sub... $395.99 Compatible with 2002-2013 Chevy Avalanche Underseat Harmony F104 Dual 10" Sub... $410.99 2002-2013 Chevy Avalanche Behind Seat Harmony F104 Dual 10" Sub Box Enclosure $220.99