We found out last Saturday that our 2009 van that was sold to us on a car lot has almost bare tires. This is in addition to falsely selling us a warranty that doesn't do anything they said it would, not telling us that there was only one key and fob and then not wanting to do anything about it, and not even doing an oil change before selling it to us. We are going through GM Canada headquarters and another affiliated dealership to get the work done and to get the place we bought it from to pay for it. We are looking at about $1,000 in total, including four new tires. So the tire pressure monitoring is the least of our worries!