I may soon be another casualty in this unfolding drama. I have been watching this thread for about 2 weeks now and just waiting for the inevitable. I have a 19 Silverado RST with less than 2600 miles. A few days ago I received a message on my touchscreen that an update is available but just ignored it several times by turning my radio off when getting out of the truck. Yesterday, with some reservation, I finally allowed the download. This morning when I started my truck the dreaded "break system failure; 62 mph" etc. message flashed on the dash screen for about a second and then went away. I ended up driving to work, the store, and back home today with no other occurrences the rest of the day. Luckily for me this was just a scare with no repercussions right now but I bet this isn't the last time I will see that brake failure message and doubt I will be so lucky the next time it pops up. Doesn't seem to me that its just a coincidence that it happened on the first engine start since I accepted that infotainment download. Just thought I would share my experience. Its very beneficial to hear input from others with similar issues.