For you newer RAM HD owners....we just ordered a new S class last week so need a new horse to pull it. With lack of available dealer stock we are looking at a factory order to get what we want. Question is how many of you are running the RAM factory trailer tire pressure monitoring system? Do you like it over after market systems? We currently have the TST cap sensors and like it. I enjoy being able to turn it on before starting the truck and the ability to see the temperatures as well. Both of these likes don't appear as features with the factory system. The dealer said the sensors "sleep" until movement is detected and no temperature gauge like the TST. It's not a lot of money considering the cost of a new truck but if I'm going to stick with the TST why pay for it when I'm not going to use it. Another cost is installing the sensors. The S class we looked at the dealer had brass valve stems, so basically no cost to spin on the TST sensors and we are down the road.