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Tpms Question

Liquid Plumber AT4
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Liquid Plumber AT4 Enthusiast

Liquid Plumber AT4

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I have a 2021 gmc sierra 1500 AT4 with stock 18" wheels and tires. Im taking those off and putting on fuel 20" wheels and 28t/60r20 toyo at3 tires  with new factory TPMS sensors. My question is the factory tires call for 35 psi and toyo said for the new 285/60r20 tires for my model truck takes 42 psi.....so before I relearn the new TPMS sensors should I set the psi in the new tires to 42 psi?...and not the factory psi of 35??. Im guessing yes to set thrm to the new 42 psi setting, but im no mechanic,  just a dumb plumber....haha.

Z06JPB Enthusiast

Z06JPB

Posted
Posted

It doesn’t matter. The dealer (or you if you have a TPMS relearn tool) can sync the sensors no matter what the tire pressure is at. Just add/remove air as necessary to get to 42psi.

 

Also, since you are adding new TPMS sensors, make sure you buy the correct sensors as there is 315mHz and 433mHz frequency sensors. They are not interchangeable. Your dealer can tell you which you need.

Liquid Plumber AT4 Enthusiast

Liquid Plumber AT4

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5 hours ago, Z06JPB said:

It doesn’t matter. The dealer (or you if you have a TPMS relearn tool) can sync the sensors no matter what the tire pressure is at. Just add/remove air as necessary to get to 42psi.

 

Also, since you are adding new TPMS sensors, make sure you buy the correct sensors as there is 315mHz and 433mHz frequency sensors. They are not interchangeable. Your dealer can tell you which you need.

Thank you, I appreciate it. I have the 433mhz sensors,  I grabbed 4 oem ones from the dealership.  

 

Any suggestions on a good relearn tool for a 2021 gmc sierra 1500 at4?  Id like yo get one to be able to do it myself.

 

Thanks again!

WeGone Enthusiast

WeGone

Posted
Posted

Bit off topic, but do you need a relearn tool when rotating tires?

garagerog Enthusiast

garagerog

Posted
Posted
22 minutes ago, WeGone said:

Bit off topic, but do you need a relearn tool when rotating tires?

If you're doing the tire rotation yourself, the short answer is yes, at least on GM vehicles.

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