We have a creaking noise when I hit a certain type of bump or a certain rough road and in two years haven't been able to zero in on it. One noise was the power shades for the windshield. Would only make noise if rolled all the way up, leave them down a couple of inches no noise.
Have another beep beep once in a while from somewhere in the dash,,,,no clue what that is either. The way sound bounces off everything in the front it is real hard to zero in on a mystery noise.
Good Luck!