So I have a 04 tl non nav non xm I have the grom aux unit with the iPod attachment, but because it is non xm I don't get track titles I just get numbers could I put the head unit from the 06 and up to get the xm/grom song titles to work, which part would it be the upper display or the lowers disk changer unit?

 

Sorry I'm also in Canada in case that makes any difference