Amazon.com: Compatible with Chevy Avalanche or Cadillac Escalade EXT 2002-2013 Dual 12" Subwoofer Behind Seat Sub Box Speaker Enclosure : Electronics
Amazon.com: Compatible with 2002-2013 Chevy Avalanche Underseat Alpine Type S S-W12D2 Dual 12" Sub Box Enclosure with S-A60M Amplifier & 4GA Amp Kit : Electronics