How do you change a 2003 Chevy Avalanche odometer from KPH to MPH?

To change a 2003 Chevy Avalanche odometer from kilometers per hour (KPH) to miles per hour (MPH), turn on the ignition without starting the engine. Press and hold the trip odometer reset button while turning the ignition from "Off" to "On." Keep holding the button until the display changes from KPH to MPH. Release the button, and the odometer should now show the speed in miles per hour.