Thanks, I found it in the maual. Will try it today, if I cant do it my dealer says to bring it in and they will recalibrate it. Apparently it happened when I got the tires rotated the other day and they werent matched up right.
Yesterday the tire pressure monitor light on my 2009 Colbalt LS came on and showed that all my tires were a few psi low. So I put a small amount of air in all the tires and now the monitor shows 2 of the tires have 45 and 48 psi and the other 2 have 8 and 14 psi. All the tires appear to be...