2006 Cadillac XLR Owner's Manual - Page 249

Clock Adjust Menu GPS TIME: The current GPS time will be displayed to the right of this screen button. Touch GPS TIME to set the navigation system time to match current GPS time. If the seconds for the present minute are greater than thirty when GPS TIME is selected, the clock will round up to the next minute. Daylight Saving Time: Touch this screen button to increase the time setting by one hour. Then touch GPS TIME to save the new setting. If the screen button is light blue, the daylight savings time feature is on. If the button is dark blue, the daylight savings time feature is off. TIME ZONE: The selected time zone will appear to the right of this screen button. Touch this screen button to toggle between time zones and select the desired one. The time of the selected zone will be displayed to the right of the GPS TIME screen button. To set the clock to the new setting, touch GPS TIME. If the system is not receiving GPS information, you can still set the time manually as described above but the GPS time and Daylight Saving Time features will not be available. Touch Return to go back to the previous menu. The following options are available from this menu: HOUR/MIN.: Touch the up or down arrows to increase or decrease the hour or minutes. If you touch and hold one of the arrows, the numbers will advance quickly. 12H/24H: Touch 12H to set the clock in standard time or 24H to set the clock in military time. 4-53