I have to be honest, if I am correct and the noise is the result of the alternator being under an excessive load, it really won't hurt anything. However, I wanted to have that confirmed. As far as the dealer, if I was you, I would make arrangements to leave the vehicle overnight when very cold weather is expected. That way they will hear it. If that isn't an option, you may have to wait until it gets worse. I'm sure you don't want to hear that, but it may be the only choice.
Wednesday, January 21st, 2015 AT 8:38 AM