znaflhr

i have a 2019 denali with 10,000 miles. recently it started showing the service brake assist warning and sd card error sd card has been removed warning that would disappear and return. scheduled service they had it 2 days could'nt find anything wrong they updated software according to a service bulletin. got it back last friday went out saturday afternoon about 3 miles from home it completely died at a red light with the same warnings and service transmission warning added before it died had to be towed to the dealer they have had it ever since i geuss they are scratching thier heads bald. if anyone knows the fix let me know so i can help them out and get my car back