GMC Sierra Owners Manual
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, then press and hold the reset button for at least four seconds. The hour meter displays for up to 30 seconds, or until the ignition is turned on. See Driver Information Center (DIC) on page 5‑33 for more information.