As above their re-flash caused the problem with the Vin. They should bite the bullet and re-flash it and correct their errors - no charge

 

Mine shudders at low speeds too. I recieved a recall notice about the steering but have yet to take it to the dealership. My truck has not been flashed and it started stuttering about a week ago. A couple of days ago it died in the driveway but started back up. I haven't had a problem with it since. I'll check today and see if I can get it to throw a code. If so, I'll post it.