I have a 2004 Escalade and it has one antenna for XM (flat nubby) and one for OnStar (short stick). I am looking at a 2006 CTS with both XM and OnStar, but I only see one antenna. How is this?

Also on the CTS with Navigation where is the GPS unit (the part that looks at the sky) located?

:yup: As of 2005, Cadillac went with a diversified single antenna for both the OnStar and XM radio (great idea, looks better). The GPS antenna is mounted in the dash.