I pulled my 2019 18s off my truck and put on 2021 Limited wheels with no tpms. Getting no errors and shows front 65 65 rears 73 75. I gotta imagine eventually itll throw a light? I have Forscan and lowered tpms to 50 a few years ago . I dont think the limited have sensors in them and if they did I heard 2020 and newer is a differant sensor.

 

Are the old tires and wheels in the bed or something?
Or, are you sure there are no sensors in the wheels on the truck now?
I don't think they changed the frequency on the newer sensors.

 

Looking to lower the threshold to 50 psi as well. When running empty or light load, I run 55 front & 50 in the rears. Is it asy to fighur out on Forscan?

 

Naw, in the garage the old rims... totally confused why it's not throwing the light.

 

Sure sounds like the new wheels have sensors. The easy way to verify is to check your actual tire pressure to see if they match what your truck screen shows.

 

And then let 10# of air out of one tire. See what the dash says.

If the wheels do have sensors, there is a procedure to teach the truck which wheel is at each location.

 

first step is to turn it the key to on and hit your hazards 5-6 times quickly, then the hud will say ready to sync sensors, then it will walk you through the whole process of letting out 5# or so of air from each tire.