I would have to go find the letter and see what it said, I was sure it was recall but went and found it. It does not indicate what it is in the letter, just additional vibration might occur (among other symptoms) and to come in and have it checked. I feel cheated, they are not even calling it a campaign. Perhaps I should write a letter to GM complaining...
The letter says, "... so we are announcing a program to prevent this condition or, if it has occurred, to fix it."
GMC is calling it a program which sounds like lawyer speak that they need to take care of it without admitting too much liability.