Counter Surveillance -- How to remove the spybox from your car

So I canceled my ONSTAR due to privacy concerns. I don't know how best to explain it but when the _ _ _ taps your ONSTAR you can't make calls and it won't save you in an emergency. That came to light during a case in which this type of government surveillance was used to nab some mafia types or whatever. Since believing in the Constitution, Bill of Rights, and US Sovereignty gets a person on the "list" nowadays I figured it was time for the spybox to go.