flutter or whine

I've got a 2024 GV60 that I took delivery on at the beginning of 2024. Recently, just over a year into ownership, I started hearing a couple very subtle sounds coming from the drivetrain, which I quickly isolated to the REAR drivetrain. It sounds like a weak whine when I'm gently decelerating...

I recently purchased a 2012 Genesis 4.6 and have noticed a high pitched noise from the glove box vicinity whenever I turn on the fan for AC or heat. It's definitely not a belt I can hear from under the hood. I already checked the cabin filter for any debris but found nothing. Any ideas for...