Silverado3.0

I bought my 2020 Silverado RST Z71 with 3.0 Duramax on January 18, 2020. Never had any recalls done. Two days ago I had the 3 message brake failure most are describing here upon push button start at 971 miles. Had no brakes at all and clicking under the dash but luckily I was off-road at the time and never accelerated past a slow idle. I restarted the truck and was left with a check engine light and the brakes were restored. I have never used the APP. to start. I drove to the dealership and got a loaner Malibu. Yesterday the dealership called and said the truck was done. The paperwork said the updated it with PIT5730 (the 2020 version of 5728B I think) but I did not get a copy of it of the actual TSB. Has anyone had this update with success? Drove today without any issues.Thanks!

I bought my 2020 Silverado RST Z71 with 3.0 Duramax on January 18, 2020. Yesterday I had the 3 message brake failure most are describing here upon push button start at 971 miles. Had no brakes at all and clicking under the dash but luckily I was off-road at the time and never accelerated past a slow idle. I restarted the truck and was left with a check engine light and the brakes were restored. I have never used the APP. to start. I drove to the dealership and got a loaner Malibu. Today the dealership called and said the truck was done. The paperwork said the updated it with PIT5730 but I did not get a copy of it of the actual TSB. Has anyone had this update with success? Thanks!