Fits 2014 UP GMC Sierra Crew Cab Alpine S-W12D4 Single 12 Sub Box & S-A60M Amp
Fits 2014 UP GMC Sierra Crew Cab Alpine S-W12D4 Single 12 Sub Box & S-A60M Amp 2014 - UP GMC Sierra Crew Cab Alpine Type S S-W12D4 Single 12 Sub Box Enclosure with S-A60M Amplifier & 4GA Amp Kit. - Empty Sub Boxes.