I get into the truck and push the start button, a very loud explosive ear piercing sound comes out of every speaker at full volume. It sounded like a canon shot out all my windows, a huge POP sound followed by scratching crackling sounds coming from the speakers. I tried turning down the volume to no avail, I turned off the audio but the loud scratching sound kept going at a very loud volume. The scratching sound went on for about 2 minutes then shut off. My ears were ringing and I was in a lot of ear pain due to the loud POP noise, it felt like my ear drums were blown out. I could hardly hear after this incident, I think I my have hearing loss from this loud noise. No one has inspected the vehicle, they say they want me to bring them the car when the problem happens again. I did not see any warning lamps or messages before or after the incedent