2021 Chevy Tahoe Premier - 8.5K miles. Mine just started whistling/whining upon start up about 2 days ago, have a svc appointment. Did yours whistle/whine all of the time (Park, drive, etc)?
2021 Chevy Tahoe RST 5.3 with 3.5K miles. I have a whine on deceleration and a little whine on acceleration, almost sounds like I have a supercharger. I thought that it might be transmission or something, but dealer says they don't hear anything. Let me know what your dealership says when you take it in. Thanks