Humming noise when tightly turning steering wheel, only during cold start and go?

[Micahsd]

mines still running quiet after the diff fluid was changed. I was able to get it ran though the power train warranty tied ti thr TSB that’s out for it.

 

[roybiv99]

2022 Yukon XL - After 2x Differential fluid changes, the noise persisted. It is at the dealer today have the rear differential rebuilt under warranty to address the issue. Stay tuned.