Mazda3, XM vs. Sirius
 

I recently took my brand new Mazda3 home, which the dealer had assured me was equipped with Sirius (and it was on the window sticker), only to find out to my dismay that the radio is XM-only. Although Sirius and XM are similar, XM does not carry my favorite station which I have listened to everyday for years.

The dealer is now dragging their feet about doing anything to help. Is it possible to replace the XM radio with a Sirius one? I know I can install a separate radio for Sirius, but that seems like an awful kludge when I just spent quite a bit on the tech package, mostly to ensure that I would have Sirius -

Thanks!
Tony