If you have the Navi upgarde look under settings. (button on the bottom left of the screen). Otherwise, make sure you are in park. Hit the info button until settings shows up on your console display. This menu only opens when the car is in park as they will not let you make these changes while the car is moving. Your owners manual also give more info about this. Here is a tip, holding down the info button will change settings or activate different items. It's simiar to doing a right click on your mouse.
There should be a round clock in the center of the dash. If so, look closely; you'll see the push buttons.
How do I change the clock setting on a 1997 Chevy Lumina with a CD stereo system?
HOW DO YOU CHANGE ATOMIC TIME SETTING
change time setting in tahoe 2003
To "change" the clock you need to "change" the radio..... To "change" the time, see Setting the Clock on page 3-9 of your "Owner's Manual", under Section 3: Comfort Controls and Audio Systems.....
Switch key into Aux position - push mode button and use up/down arrows to adjust the clock.
You simply hold the clock button in for a few seconds until the clock blinks ... then you use the radio station back button to change the hours and the radio station front button to change the minutes.
You can change a sleep routine by maybe setting an alarm clock for the next month.
Twist the knob sticking out beside the clock. Twist it to the left for adjusting the hours, and to the right for setting the minutes.
Press and hold the clock botton. After the beep, both hour and minute values will be blinking. You can then set the clock by pressing the H for hour or M for minute.
You use the little knob that you use for setting the trip counter so instead of pressing it in (which resets the miles) turn it left to change the hours and right to change the minutes on your clock
Press both setting buttons together for about 5 seconds.