I have a new whine in the car, sounds electrical. The alternator is still putting out ~13.5 to 14 volts under load at fast idle. I can't tell if it is coming through the speakers or not, doesn't seem to be radio related. I run XM on a direct feed. Any thoughts on anything I should check before the investment in a new alternator? Thanks, FBNE.
'01 C5 red, no mods