Upper control arm squeaking? $8 fix and 15 minutes of your time.
Watch this video, get $8 RedNTacky Grease from HomeDepot (or similar grease, read somewhere marine grease good too).
I modified the approach using an 18Gauge needle and a 10 mL syringe.
I was able to put air suspension in high and there was wide open easy access.
Injected 8 mL (seemed like the max) and it instantly fixed the problem. See the picture. I have a 2018 Model X.
Good luck!
(I donated to his PayPal, cuz this fix is just awesome!)
The water-resistant Lucas Oil 14 oz. Red 'N' Tacky Grease, fortified with rust and oxidation inhibitors. It makes a great choice for use in many agricultural, automotive, industrial and marine applications.
www.homedepot.com