They are available on Amazon. They just screw onto your valve stems and then report to a display inside the truck. For example:
https://www.amazon.com/dp/B07PP55QF9
Or
https://www.amazon.com/Minder-Research-TM22142-TireMinder-Transmitters/dp/B082QJG23Q
A lot recommend the tireminder one.

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You may need to go to a tire store and have your valve stems switched out to metal stems. I've heard stories of the added weight of the tpms cap causing rubber stems to break off. When that happens, you may not get an alarm on your monitor because the sensor is just GONE.