Hello everybody!
First of all, sorry for my bad English, but I'm Italian and I'm using my 2007 Lade here in the old Europe!
Few days ago I removed the OnStar module (it doesn't work here) and I added the BlueStar module (made by Costa Tecnologies), then I noticed that the GPS cable coming from the roof antenna to the OnStar module has exactly the same connector of the navigation module. What if I connect my nav system to this cable coming from the roof? Will the signal be better or what?
Thanks a lot!

Freddy