Jody Robertson

I have a 2019 Suburban with 33,000 miles on it. Since purchasing it in October of 2019 I have had a message appear in the Driver's Center, "Steering assist is reduced drive with care". The Stabilitrac light is on solid as well. No other lights are on. The truck will not go into reverse when this happens and has no oil pressure. The truck has no power steering either. I have had it at the dealer and they have checked battery, battery cables, and some other sensor they said, all of which checked out. You can let the truck sit for 5-10 minutes and it will "reset" and be fine. No codes can be found when the truck is scanned. Has anyone had this issue? Any help or advice is appreciated.