Hey, Im new to these forums and I am sorry if this is already a topic somewhere but I dont know too much about in depth issues with cars so i thought Id seek some advice on a forum. But today I started up my truck and noticed everytime my RPMs would go up there was a whirring sound in the front end of my truck that pretty much followed the RPMs through the gears (higher RPMS the whirring was louder and faster, lower was the opposite) I looked online and found it could be the serpentine belt tensioner or my Idler pulley or possibly the bearings in one of the pulleys. Does anyone on here know what exactly itcould be? thanks for any possible advice or any diagnoses.