2021 Silverado TB 5.3L.
Bought with 13 miles on it. When I hit around the 500 mile mark, I noticed that every now and again within a minute or two of starting and driving out of the neighborhood, I would get a flashing SES light. Sometimes it stays on for 20 or 30 seconds and clears. Other times I will shut the motor down and restart and all is fine. It does this maybe once a week.
Never felt the motor misfiring when the light was flashing, and the Onstar does not report any issues with it. Right now it is just irritating, but as anyone else experienced this and more importantly found a solution?