| Onstar GPS? I was looking at my local dealers CTS inventory and noticed out of about 15 cars, none had nav. I asked my salesman why and he said, "People are saving the money and just using the Onstar's voice turn by turn directions to get where they want to go". Has anyone else used this service? Is it effective? How hard is it to set up a trip? How much extra a month do you pay Onstar? |