I searched and could not find a thread with the answer I was looking for. I have a 2008 Silverado 1500 and have had it brand new since Jan 2009. I have about 80k miles on the truck, a few months ago one of the tpms was reading 40-90psi. It was just jumping through that range constantly. Now it doesn't even read just has the "--" and I have the "Service Tire Pressure System" error all the time on my instrument panel. I called my local tire shop and they said that the battery probably went dead in the sensor. I have read that those batteries usually last for 10 years, has anyone had an issue like this? The TPMS is a royal pain anyway, I just hate seeing the light and the message whenever I drive.