Originally Posted by JB1

My car came with a 3 months XM subscription for "free". When I received the invoice for the next 3 months (after the first 3 free were over), I called and said I was thinking about not extending my subscription. That's when they made me the offer for the lifetime subscription. Assuming the OP got the same "3 months for free' with the car, he can do the same as I did.

However, I daon't know if it is possible to switch to Sirius. I just checked the XM website and it looks like I can only add "the best of Sirius" to my XM package. Hope this info helps.