"Service Tire Monitor"

Either you need to re-set your tire pressure monitor ( most likely the dealer already tried to do it ) or your monitor system has a problem. The most common problem is a bad tire pressure sensor. You need to have a savy tech scan your system and then determine what the problem is with your system. This is a sophisticated job that requires a robust scanning device i.e. a parts store scan will not read this system properly. A good independent shop that does good work on GM should be able to handle this. Good Luck!

u can take it right to an auto zone, pep boys, autoland, any local parts store, and ask them to hook your car up to the computer to give you the error code. they can tell u exactly whats wrong. and they usually do it for free.

i would bet you have replaced the tires on this car...right? This sensor lets you know what the tire pressure is in each tire. It is the sensor that tells you on your in-dash computer what the tire pressure is in each tire. The reason I asked about having had the tires replaced is that theses sensors can and often are re-used. Good tire specialists will check these for you to see if they need to be replaced. Others will replace them whether they are "clogged" or not. Others will replace them only after checking them. They are not at all accurate, but can be menacing for you. I dont remember if they are in the stem of the individual tires, but I believe that they are. If you have recently purchased new tires and purchased they came with lifetime rotation, (which the way Cadillac's eat up tires, you should rotate often), take it back and have the sensor checked with teh rotation. I had new tires put on and they reused the sensors. One of the tires registered 51 psi for a while. I took it back and they let an amount of pressure out of the tire, then added it back and that seemed to fix the problem. I have an 06' CTS and the monitor's never register the correct tire pressure. You have only to check the tire pressure with a gauge to see how "off" these sensors are. If you have taken this to a Caddillac dealer, it suproses me that they didn't at least tell you to replace the sensors/stems. They must not think it is a big deal! As I said, it is more menacing than anything, no one wants to drive a Cadillac with "caution" lights popping up all the time. Have them checked at an Autotire center or some tire specialist center. They seem to know what is going on.