1997 chevy blazer radio problem

i was afraid no one would see it here but if your not gonna help with my problem no need to reply thx

no its just a regular delco but today he slammed his passenger door shut and the passenger speaker came on maybe a loose speaker wire or bad ground maybe? but what are the chances every speaker in the truck has a loose speaker wire o and the dealer said if there was a stock amp it would be under the center console i didnt see one so i dont know what else it could be