I am so glad I found this thread and so disappointed that so many people are having the same issue. I have a 2020 Silverado LT Z71. The third day after purchasing the truck it wouldn’t start, all the same symptoms as everyone else. I was told it was the fuel control module. The dealer picked my truck up, replaced it and it drove fine for about 3 months. Then it wouldn’t start again. Dealer had it for a week and couldn’t find the issue. I was able to take videos that showed low voltage and check engine lights although they weren’t on at the dealer. They gave me the truck back and about a week later it didn’t start again. They had my truck for about 2 weeks and finally said they received the ecm bulletin. They replaced it and today after getting gas the truck took a while to start, but did not crank like the usual problems. So I began looking around and found this forum. I am expecting another issue soon. I have filed cases each time with GM since the first problem and am currently dealing with them now, they have no answers and so far I do not have high hopes. I will be following this thread to see what others report back with.
