AC fan noise?

[Arthur]

Just took the delivery of a Lightning XLT SR. It drives fantastic and quiet but soon found that the AC fan seems to make some screeching noise when the fan speed is above 2. It is not very loud but noticeable since the truck is quiet. Not sure if anyone here experiences similar issue.

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[Arthur]

Just a quick update on my findings and how I solved this issue. Hope this helps others who may run into the same problem.
I listened to where the sound came from and tracked it down to somewhere inside glovebox. I then took off glovebox and checked components behind glovebox. Found that the cabin air filter door is not fully in place. Air through the gap causes the screeching noise. The noise is gone after the filter door is fully seated. Problem solved.