My family and I were about 200 miles into a trip when the buttons under the screen quit responding and the screen was locked on my home screen. It was no longer updating the range or mpgs just frozen. A few minutes later the whole screen just went dark and then came back up as if I had just started the car (we were driving the entire time). Did it again after refueling. Prior to this I've had zero issues with it and I've had the truck for 18 months. Is this an indication that I need to have the unit replaced? Thanks for your help.