My refreshed 2022 Silverado RST shut off today after a long 3 hour trip for work. It turned off after hwy traffic came to a full stop.
My AC was on because Houston. So it's my understanding the Auto Start / Stop feature doesn't engage while AC is on. However even if it was the auto stop it didn't turn back on when I let go of the break. I had to turn the truck back on with the start button and put it back in Drive.
It did turned right back on with no issues or check engine light or any other light. Also when it shut off, everything stayed on, infotainment, radio.
It's almost like a Auto Start / Stop glitch.