I just got a call from my Cadillac dealer about my inquiry to have my analog/digital capable Onstar replaced by the fully digital unit. The reason I wanted to do this is to get rid of the antenna on the rear glass. They are saying that they are not sure, but they think the analog antenna on the rear glass would be replaced by another antenna. I thought that with the conversion the only antenna would be the one on the roof like the 2005 CTS-V. Does anyone have the hot poop on this?:hmm: