1998 sts

Could someone please tell me how to do the on board diagnostic? For some reason my car won't start.

Press the info up button and the on/off button on the Driver Information Center. They are the buttons just to the right of the dash. Hold them for about 5 seconds, or until all the dash lights light up and the system enters the diagnostic mode. This should then scroll through all the fault codes.
Let me know what codes there are.
Does the car crank, or is there any messages on the DIC?

yep. thats how 2 do it. . .. .go sox!