Sorry to hear about this. I recently performed an oil change on my 2015 and all is well.
Couple curious questions. Did you replace the oil filter or clean it? Did you "bleed" the oil from the oil check screw? Some folks swear bleeding the oil isn't necessary, though I always do.
When checked, can you tell us what the dealer said was causing the screeching?
Thanks, and hope they can fix or replace as necessary.