There is really no difference in the car system vs RV except that it has to accommodate more tires, typically 6-10 but maybe as many as 12-14 in extreme cases. Naturally, the extra wheel sensors (sometimes called sensor channels) add substantially to the cost. I'm guessing your Silverado 2500 plus travel trailer has a total of 8 tires to monitor.
Your Silverado already has a TPMS for its own tires, so you could get a 4-channel (sensor) system just for the trailer. However, many trailer owners seem to prefer to have one monitor for both vehicles, so they get an 8-10 channel system and put duplicate sensors on the truck tires. The factory sensors are inside, so you can add external sensors on the valve stems. That means you will get two warnings if a truck tire gets low, one on the truck dashboard and another on the add-on TPMS monitor.
The technology for add-on TPMS is pretty much mature and most work decently. TST is popular, as are EEZE, Tire Minder and Pressure Pro. Features such as flow-through valves or repalceable batteries are largely a matter of personal preference and not a go/nogo decision factor.