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sounds like a wheel bearing assembly to me. i would have the clearance checked at a jeep dealer. if you can rock the wheel gently while moving forward and the sound fades and comes back, definitely a wheel bearing assembly.
humming could be wheel bearings - jack car up and spin wheels - they should feel and sound smooth. Grab top and bottom of tyre and try and move backwards and forwards, if it does - whell bearing shot or needs tightening.
Transmission noise could be a driveshaft or gearbox mount being worn / broken. Jack up and move all these bits about and llok / hear for movement and you'll find the mount.
My advise is when u get a humming noise when banking left or right. Its beter to change both left and right wheel bearing and ball joints. Cause if u think about it those parts are put on at the same time . So if u think about it they have the same where in Terre . left or right hope this helps you.
The Denali's are really susceptible to front dif. wear and failure. Because it is AWD, the front dif is always working unlike a 4WD. GM, in order to lighten up the front end built the front dif in aluminum. If it was the same as the rear, it would be bullet proof, but much heavier. After about 80,000 miles it is common to have bearings failing. Remove the drain plug which happens to be magnetic. You may see more than just the normal fine filings. You will likely see larger chunks of metal some of which is not even magnetic but will drain out with the oil. You are likely looking at a $1500 rebuild. It will get much louder and run for a long time before it really goes south.