Yep, that can be annoying and it wears the starter and flexplate out. Some GMs have a dash switch (an A with a circular arrow). If yours has it, you can turn Stop/Start off for that ignition cycle by pressing it each time; it re-enables next key-on by design.
Here is a quick hack that can work
At a stop, shift to L/Manual, tap + up to the highest gear (typically 6), then shift back to D. This prevents AutoStop until you shut the car off again.
Let us know how it goes.
Thursday, November 6th, 2025 AT 9:36 AM