First of all, I'm sorry the previous person had the nerve to call you a "moron" and not even spell the insult correctly, how ironic. Obviously this person is not the owner of a 2004 grand prix or does not even know how to operate their own.
Before re-setting the tire pressure, make sure you have corrected the problem causing the warning. The warning message appears if the pressure in one tire becomes 12 psi lower than the other three tires. Your car will "learn" the pressure at each tire every time you reset the system. This takes 45-90 minutes of driving per the operating manual. This does not have to be accumulated in one single trip either.
To reset the tire pressure monitor system, after correcting the problem, you have to use the options under the Driver Information Center (DIC) on your dash. The button you want to utilize is called the "set/reset" button, it is the third button from the left, directly in the middle of all the buttons. It has an arrow that points to the left. Press and hold the button until the DIC displays "Tire Inflation Has Been Set", this message confirms the tire pressure system has been reset. If, by chance, the DIC does not return to the standard display with the date, ect., you can press the "options" button to get back to the standard display. The "options" button is directly to the right of the "set/reset" button you just got done using. It has a lower case "i" on it.
I hope this answer helps you, and good luck!!!
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