Just purchased my 2015 platinum and have only had it 2 days but each time I get in the car I hear the message "This car is in demo mode, please contact OnStar". I assume this is just a message informing me to setup an Onstar account and nothing about the actual vehicle still being in demo mode. I ask because I got in the vehicle once and the electronic steps kept extending and retracting until I turned the vehicle on and off a few times. Also, my rear cargo/truck door refuses to close electronically/automatically. Requires that I push it closed.