Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry for the long wait
at idle with the hood open where do you hear this noise from ?
if it is from the front of the engine if you remove the engine drive belt will the noise go away at idle ?
that is the next step
if the noise is gone with the drive belt off then there is an accessory that the belt is turning making this noise
if its not the alternator then this issue can be the belt tensioner or the harmonic balancer or ac compressor causing this noise
but the bot***** *****ne is you need to see if that noise is gone with the belt off and again if it is the noise is something the belt is turning causing this noise