2008 GMC Sierra 1500 Pickup Owner's Manual - Page 171

Speedometer and Odometer Your speedometer lets you see your speed in both miles per hour (mph) and kilometers per hour (km/h). Your odometer shows how far your vehicle has been driven, in either miles (used in the United States) or kilometers (used in Canada). Holding the reset button for approximately one second while the trip odometer is displayed will reset it. To display the odometer reading with the ignition off, press the reset button. See DIC Operation and Displays (Using DIC Buttons) on page 3-52 or DIC Operation and Displays (Using Trip Odometer Reset Stem) on page 3-58 for more information. Engine Hour Meter Display The Driver Information Center (DIC) can also display the number of hours the engine has run. To display the engine hours, turn the ignition off, press and hold the reset button for at least four seconds. The hour meter will be displayed for up to 30 seconds, or until the ignition is turned on. See DIC Operation and Displays (Using DIC Buttons) on page 3-52 or DIC Operation and Displays (Using Trip Odometer Reset Stem) on page 3-58 for more information. Tachometer Your tachometer displays the engine speed in revolutions per minute (rpm). See "Grade Braking (Allison Transmission®)" under Tow/Haul Mode on page 2-31 for more information. Notice: If you operate the engine with the tachometer in the solid red area, your vehicle could be damaged. The damages would not be covered by your warranty. Do not operate the engine in the solid red area. Trip Odometer The trip odometer can tell you how far your vehicle has been driven since you last set the trip odometer to zero. Press the reset button, located on the instrument panel cluster next to the voltmeter, to toggle between the trip odometer and the regular odometer. 3-35