after all the replacing with the alternator and belt we removed the belt to see if it still squeels and it doesnt. no mechanics can tell me whats wrong.
i replaced the alternator and the serpintine belt and its still squeeling bad. on 1999 Chevrolet Silverado 1500
look at the power steering pump, idler for the belt, ac compressor if you have one and lastly, the tensioner which I think is your issue. it sounds like you need a better tech. it is not that hard to find this out for a shop.