I have a 2020 GMC Denali one ton,I have 186000 kms on it, same problems, took into dealer they said my brakes where locking up, $3900.00 later with transfer case fluid change, transmission fluid and filter change, rear differential fluid changed. They also done rear brakes and parking brakes.
Still happening, going back to dealer.
I think it is tranny sensor!
We will see, they where convinced they had it fixed.