GM Service Manual Online
For 1990-2009 cars only

To adjust the time and date:

  1. Turn the ignition key to ACC/ACCESSORY or ON/RUN, then press , to turn the radio on.
  2. Press to display HR, MIN, MM, DD, YYYY (hour, minute, month, day, and year).
  3. Press the pushbutton located under any one of the labels to be changed.
  4. To increase the time or date, do one of the following:
  5. • Press the pushbutton below the selected label.
    • Press SEEK.
    • Press FWD.
    • Turn clockwise.
  6. To decrease the time or date, do one of the following:
  7. • Press SEEK.
    • Press REV.
    • Turn counter-clockwise.

To change the time default setting from 12 hour to 24 hour or to change the date default setting from month/day/year to day/month/year:

  1. Press and then the pushbutton located under the forward arrow that displays on the radio screen until the time 12H (hour) and 24H (hour), and the date MM/DD (month and day) and DD/MM (day and month) displays.
  2. Press the pushbutton located under the desired option.
  3. Press again to apply the selected default, or let the screen time out.