Verizon Intros OnStar Combo Plan

I was just wondering what it would take to convert an old analog onstar unit in a 2003 truck to the new digital unit that would make it possible for me to take avantage of this service. There would have to be a conversion kit availabe at some time, since the biggest part of the this market will be auto models years 2003 and earlier.
Man, I knew that a wireless service provider would eventually take avantage of this onstar phone service market. Im just glad that it was Verizon. 😁