How do i set the clock on a gmc truck 2000 gm?

To set the clock on a 2000 GMC truck, first turn on the ignition but do not start the engine. Locate the "Clock" button on the radio or dashboard. Press and hold the "Clock" button until the display starts blinking, then use the "Seek" or "Tune" buttons to adjust the hours and minutes. Once the correct time is set, press the "Clock" button again to save the settings.