Hello,
A few years back the miles, temp and gallons displayed on the dash accidentally got changed to kilometers, celsius and liters. Is there anyway for a person to be able to change them back to miles, fahrenheit and gallons themselves.... Without having to take it to a mechanic and hooking it up to a computer? Some sort of code you could punch in on the thermostat or something? This is for a 1989 Cadillac Sedan Deville. We didn't see anything in the manual about this. Thank you for your time.