first year GM offered XM radios

I have a 2002 trailblazer, non-bose, with on-star. I was wondering if GM ever made a Stock CD player that included XM that could be swapped in. I really dont want to stick the factory radio under the seat to add a aftermarker radio, and the XM modulated ones sound bad. I also heard GM changed the data platform they used in 2003 or 2004 not really sure what that means, but from what I understand those newer radios are not interchangeable. Any info would be helpfull. If you have one with XM does it have 'XM' printed on the front of the radio? Thanks!!! Jim