2004-2007 Cadillac CTS-V General Discussion Discussion, Phone antenna? in Cadillac CTS-V Series Forum - 2004 - 2007; I have a 2004 that seems to have been upgraded to the 2005-2007 digital OnStar unit (I checked the p/n ...
Automobile(s): 2004 V (B&M, muffler delete), 2003 Corvette
I have a 2004 that seems to have been upgraded to the 2005-2007 digital OnStar unit (I checked the p/n on it, it listed as 2005-2007). Everything works, but I can't get the phone to work at all. The unit in the side of the trunk still has a coax connection to the stupid glass-mount antenna.
Do I understand that the 05-07 used the sharkfin on top for both OnStar and phone? Can I easily find out what I have up there, if this is true? The only pic I can find seems to have three connections to the sharkfin: