2003 GMC Yukon Owner's Manual - Page 210

Hourmeter Press the trip button to scroll to the hourmeter. The hourmeter shows the total number of hours the engine has run. Pressing the reset stem on the instrument cluster will also display the hourmeter after the season odometer is displayed. To stop the counting of time, press the select button briefly while TIMER is displayed. To reset the timer to zero, press and hold the select button, or the trip odometer reset stem, while TIMER is displayed. Fuel Information Button Use the fuel information button to scroll through the range, average fuel economy, instant fuel economy and the GM Oil Life System™. If your vehicle is not equipped with the DIC steering wheel control buttons you will not be able to display the fuel information. Annual Log Press the trip button, or the reset stem on the instrument panel cluster, to scroll to the annual log. The annual log shows the mileage accumulated since it was last reset. To reset the annual log, press and hold the select button, or the trip odometer reset stem for approximately two seconds. Timer The DIC can be used as a stopwatch. Press the select button, or the trip odometer reset stem, while TIMER is displayed to start the timer. The display will show the amount of time that has passed since the timer was last reset (not including time the ignition is off). Time will continue to be counted as long as the ignition is on, even if another display is being shown on the DIC. The timer will record up to 99 hours, 59 minutes and 59 seconds (99:59:59) after which the display will roll back to zero. Fuel Range Press the fuel information button until RANGE appears to display the remaining distance you can drive without refueling. It's based on fuel economy and the fuel remaining in the tank. The display will show LOW if the fuel level is low. The fuel economy data used to determine fuel range is an average of recent driving conditions. As your driving conditions change, this data is gradually updated. Fuel range cannot be reset. 3-56