I know this may sound funny, but my wife picked me up for lunch today and commented that the car was making a moaning sound. I laughed, but sure enough, at the first red light, I heard this low freq moan. It moaned at idle wether in park, or drive, but any slight RPM above idle and the sound disappears.
Car is a 2001 Impala LS, 3.8, 55K miles.
So, she parks and shuts it off. I pop the hood and see nothing wrong visually. I ask her to restart the car, and no moan?
She said for the rest of the afternoon no strange sounds?
Any suggestions?
Thanks, and have a nice day,
Bill