So today I got all four warning messages,
Brake system Failure
SVC brake assist
SVC trailer brake system
SVC ESC
and vehicle speed limited to 62 mph. So I drove an hour to the closest Chevy dealership, white knuckle the entire way in the rain!
After three hours they said it was fixed. Stating they found codes c2a17- hydraulic brake circuit excessive springiness and c05b0- brake circuit leak detected level two. ( tech noted zero leaking found) Noted that first hydraulic pressure test failed, reprogrammed again and it then pass the pressure test.
So picked it up and drove approx. 50 miles and the SVC brake assist warning came back!!!! So now what? Should I wait for the entire laundry list of warnings to come back along with no power brakes? This is very frustrating.