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Originally Posted by Old blue eyes
So has anyone actually gotten this fixed for good? Seems like a lot of band-aids. I have 2016 v6, just left the dealership who stated they didn't feel it except for one instance. Even let the service manager drive the car, but of course I felt it on the way home. The first time they reset the tcm after I told that wouldn't fix it. This time they wouldn't even accept the car, but will get back with me if GM has any suggestions. It's not as bad others are reporting but I'd like to do something before the warranty is up and gets worse. I liked the car but honestly I'm looking at selling it as I don't know if I'll ever really trust it.
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I believe TSB 18-NA-355 has a specific test where a tech connects a laptop with GM diagnostic software and takes the car on a test drive to verify if the car has the problem or not. It isn't a "seat of the pants" diagnostic. Maybe time to take the car to a different dealership for diagnosis and resolution while you are still within the powertrain warranty.