What parts? From what I read they're just going to drill holes in the existing plastic shield to let oil drain out from sloppy oil changes. Not even gonna bother taking mine in for this unless there's some other reason to bring it in - then I'll have it done.Actually, 3 weeks is pretty quick. Consider that GM needs to get the information and any required parts to their dealerships before the first owner calls in for the recall. I have seen up to six months from the time the recall was announced to the time the first notices were mailed.