I'm sorry you haven't been in contact! I would be happy to look into this more and follow up with you in a private message with anything further. Let me know! Again, very sorry for any inconvenience!I'm still waiting on a response from GM. They said you will hear something within 48 hours and that was 15 days ago. Ours has been in shop a total of 47 days, 5 times for cel and 3 times the cel was for a p0133. Even one of the GM girls on here said she put a note on my case and let them know I was awaiting a response, that was last week. When my wife opened the case (car is in her name) the customer service agent said get a lawyer. The girl changed her tune when she read verbatium from the GM website "please call us before you contact a laywer". I know GM will cut all ties if you laywer up so we were waiting to see what they do before we contact a lawyer.
This last time the car was in the shop for a P0133 it got an ECM update. I assume GM is changing some parameters and I'm guessing leaning it up a bit. All the paperwork said was fuel trim reprogram. This has been the only time the car was in the shop for just one day.