TPMS won't stay learned?

[KidWgn]

The multi-frequency sensor is called a T10 sensor, if that info helps at all. Operates between 315 mhz to 455 mhz....I think.

I hadn't heard them called that before. Schrader calls it their "EZ-sensor GO".

 

[Fless]

The multi-frequency sensor is called a T10 sensor, if that info helps at all. Operates between 315 mhz to 455 mhz....I think.

Not "between," it's either or, depending on the vehicle requirements. Frequency is programmed when the sensors are initially activated by a programming tool (not to be confused with an inexpensive tool used to re-learn wheel positions).

EDIT: I wonder if the sensors were programmed ("initialized" is what I'd call it) for the truck, or they're not pre-programmed.

You'll probably need a good tool that will read their IDs and write them to the truck. I have an Autel scanner that can do the initial programming of Autel MX-sensor sensors, as well as write them to the truck through the OBD port.