Originally Posted by
CrazyOne
Y="Specialty" (hopefully a little nicer than a regular model in that class) so YB="Specialty Compact" which is kinda ridiculous but yes they have Specialty Compact and have for at least a few years. Also YC, YD, YF and I think after that they give up on the Y prefix. I hope there's not a YA as I can't imagine what that would be but there could be.
FWIW, in Canada (at a corporate location) I have driven YG (Chrysler 300C) and YI (loaded Cadillac DTS)
-Brian