For a week it was doing just fine then it did it again. This time while my wife was driving a few blocks from home. It died as she coasted around a corner. She pulled over and .....no start
she tried for a while then waited 15 minutes after praying a bit and it started.
In desparation I decided to replace the Battery.
A week later, just yesterday, it happened again. This time as we were trying to leave the garage and were in a hurry. No start.
So I spoke with the GM Service Manager. He tells me this has happened on many cars and it'* hit or miss trying to find out if it'* the PCM, which he tells me would cost $3000. for a new one or $700 for a rebuilt one, or it could be one of 20 or so relays.
They would have to test while the problem was happening. Problem is that it only lasts a short time and is so intermittent......Grrrrrrrrr.