GM Service Manual Online
For 1990-2009 cars only

To change the time, perform the following:

  1. Turn the radio on and wait for the time to appear on the display.
  2. Press the TIME button for more than two seconds. TIME ADJ will appear on the display and the time will flash.
  3. Press either SEEK arrow to adjust the hour.
  4. Press either TUNE arrow to adjust the minutes.
  5. Press the TIME button again to save the new time.

The radio will automatically exit the time setting mode if no adjustments are made for eight seconds.