Anyone know if possible or how to maintain OEM functionality while switching from factory installed Sirius to XM satellite radio? I am hoping that someone know a way to simply switch out the Sirius tuner for XM and still keep full use of the head-unit LCD Data/Read-out and all other functionality. I get a lot of audio drop-outs with Sirius plus the quality of content on what I use does NOT seem to be in par with what I get from the XM tuners I have employed at work.