Hi all,

I just heard this... Is it posible to unlock a car 20 miles away (it has the key remote)? Say if you lost yours keys but your wife has another remote... she pushes the button from home into the cell phone that you right next to the car

This little gem of misinformation has been making the internet rounds for years. See:
snopes.com: Cell Phone Unlocks Keyless Cars (http://www.snopes.com/autos/techno/keyless.asp)

That is misinformation, but I believe Onstar can unlock your car.