How do you reset the low tire pressure indicator on a 2000 Buick LeSabre?

I'm assuming that you have what is know as a "driver information center", (DIC). On page 6-44 of the owners manual they warn you to make sure that your tire pressure is good before reseting. Turn ignition switch to "Run" or on. Press the "Gauge Info" button until "Tire Pressure" appears in display. Press & hold "DIC Reset" for about five seconds. A message reporting "Tire Pressure Reset" should appear in the display. The manual recomends that if this procedure doesn't work, try it again. If that doesn't do it there could be a problem with the system. After letting go of the DIC Reset button "Tire Pressure Normal" should show up. The process is not complete. The car has to finish the job by it's self. The manual states that it can take any where from 45 to 90 minutes of drive time.