I don't know if a 2004 is the same but you'll find an answer posted at http://www.chevytalk.org/threads/showthreaded.php?Cat=&Number=972176&page=&view=&sb=5&o=&vc=1
Usually, with the radio off, you hold in one of the buttons with an up or down arrow for several seconds until the time starts to change. Then, you can use the one for the minutes and one button for the hour. Hope that helps!
How do youchange the clock on a 2002 zx2 ford escort?
AnswerTurn the radio off first. Press the set button. Use the scan and seek buttons to set the hour and minute.
Open that little book that came with your car, called the owner's manual. There you will find this information.
To set the clock on a 2002 Chevy cavalier you must press and hold one of the arrow keys located near the clock. You will hear a "beep" this is letting you know that your car is ready to set the clock. Quickly after you hear this beep, press the arrow buttons up and down and that changes the time. Leave it alone after the time is set and it will set itself permently until you change it again!! Very easy!
see owner's manual
Depending on the set up. The hour/ min buttons are located on the lower right corner buttons if it is a CD player. Hold the buttons down to set the time. If you Cavalier has a set button, hold it down and while the set light is on use the seek and scan buttons to set the clock. If your 2002 Chevy Cavalier does not have a "set button" like mine, then hold down the "up/down" arrows located in the right corner for a few seconds and the time will change. down/hours up/minutes.
Read the owners manual or if you don't have it see related question below..
Not sure of the specifics, but I know the radio needs to be off to start.
You hold down the up and down buttons to the right of audio button
how do you set the clock on a 2003 chevrolet trailblazer
Press and hold the up & down buttons that change the bass, treble, balance, fade, etc.
There is a Up and Down Arrows becide the audio button, Press the arrows for about 3 seconds it will beep, It will change the Hour and Min.