Hi I have a 1999 Chevy Trailblazer and the temperature thing works alright just when you click the button to go to another screen to see gas mileage or average trip speed (MPH) it never changes and it's been the same since I got the vehicle. My friend suggested that I change a fuse? Not sure which fuse it would be because i don't have an owners manual. If anyone has any idea what to do could you let me know. Thanks