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Ace Holliday
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Use the arrow key pad on the left of the steering wheel. Hit the left arrow and it will take you to some options. Scroll up or down using the arrows. Select "Settings" (or something like that, not sitting in the truck right now) and scroll to the TPMS.
But you do need to read the manual. There is a TON of stuff you should know to get the most out of your awesome truck. Use the Appendix and look under TPMS or Tire Pressure Monitoring System.
Frenchy
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If you have at least a mid-level instrument cluster then you already have it in your dad. You have to go to driver assists and scroll down to tire pressures which I think is next to the bottom. Go there and it will show all four tire pressures. Be aware it does read a little bit low I think at about 1 to 2 pounds depending. That is what I've noticed with my truck at least
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Any idea why the TPMS readings are all over the place? I see all 4 tire pressures go up and down in about a 4 lb range before and while driving. My tires are set to spec using a digital pressure gauge. 30 lb in each tire read between 29 - 32 lbs..
Ace Holliday
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Temperature. Need to be checked And adjusted when cold. If the sun hits a tire it will change the pressure by a bunch. Driving a couple of miles raises the temperature and therefore psi. Don’t
adjust pressures when they are hot.
Edit: Trust your gauge not the dash. The numbers on the dash are for reference only. The TPMS system should not be used as a gauge.
slowmachine
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What you are seeing is normal. A long-standing method to determine cold pressure setting for non-stock tire sizes, or for custom-built cars, is to adjust through trial and error until you get a 4 PSI temperature rise from cold to normal highway cruising. That establishes the starting point for tuning the handling characteristics of the car.
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