TPMS reading rear tire pressures incorrectly

[msmanuel]

The TPMS on my 2022 Silverado 2500 HD High Country recently started misreading low pressures on both rear tires. I know the tires are not low since i topped them of at 70 psi and they were only down to 64 psi when I started, which shouldn't read as low. It started after the first real cold snap of the season. Other posts that I've read say you can reset the TPMS using a button located under the steering wheel. I can't find a button under the steering wheel and I can't find anything pointing to one in the manual. I even downloaded the .pdf version so I could search for it. Has anyone had success in resetting the TPMS or been able to find this button under the steering wheel?

[revrnd]

Never heard anything like that. You can relearn the sensor positions (after rotating the tires) but your can't reset the pressures yourself w/o the proper equipment.

Edited December 16, 2024 by revrnd

[newdude]

1 hour ago, msmanuel said:

The TPMS on my 2022 Silverado 2500 HD High Country recently started misreading low pressures on both rear tires. I know the tires are not low since i topped them of at 70 psi and they were only down to 64 psi when I started, which shouldn't read as low. It started after the first real cold snap of the season. Other posts that I've read say you can reset the TPMS using a button located under the steering wheel. I can't find a button under the steering wheel and I can't find anything pointing to one in the manual. I even downloaded the .pdf version so I could search for it. Has anyone had success in resetting the TPMS or been able to find this button under the steering wheel?

 

 

Have you rotated your tires recently?  

[msmanuel]

I haven't rotated the tires recently. The system just started reporting the rear tires as low even though when I tested them they were not low.  At least not low enough that it should trigger the low pressure warning.

[revrnd]

@newdude Is the TPMS low pressure threshold a set amount below the spec or a percentage?

 

A 6 psi drop may not sound like the tire is low, but maybe it is to the system?

Edited December 17, 2024 by revrnd

[MaverickZ71]

When the TPMS batteries get weak, it usually shows up in cold weather, on the rear first, and on the right side first. It begins by showing incorrect, fluctuating low pressure that may self correct when warm, but progressively gets worse until it shows "--" for the tires with dead TPMS batteries. 

[msmanuel]

The setting hasn't been changed, but I'm not sure what it is. I'll have to check. The TPMS is saying the pressure is at 54, but when I checked it with a tire gauge it said 66 and I have since inflated them to 70 but the sensor still reads 54.

[msmanuel]

@MaverickZ71 That's exactly what happened, though it was left rear followed by right rear. It hasn't really warmed up to see if they self correct. I'm guessing I'd need a tire shop to replace the batteries in the tires.

[MaverickZ71]

13 minutes ago, msmanuel said:

@MaverickZ71 That's exactly what happened, though it was left rear followed by right rear. It hasn't really warmed up to see if they self correct. I'm guessing I'd need a tire shop to replace the batteries in the tires.

 

In my experience, pre-covid it seemed like those batteries lasted 7 years or more. Since then, about 3 years on some. 

 

It SUCKS that we have to pay for removing the tire(s) from the wheel beads to replace the TPMS sensors with ones with fresh batteries. Next time, I will get AC Delco ones, as the Firestone/Bridgestone store replacements are only lasting half as long.

Edited December 17, 2024 by MaverickZ71

[newdude]

2 hours ago, msmanuel said:

I haven't rotated the tires recently. The system just started reporting the rear tires as low even though when I tested them they were not low.  At least not low enough that it should trigger the low pressure warning.

 

1 hour ago, msmanuel said:

The setting hasn't been changed, but I'm not sure what it is. I'll have to check. The TPMS is saying the pressure is at 54, but when I checked it with a tire gauge it said 66 and I have since inflated them to 70 but the sensor still reads 54.

 

 

Could be two bad sensors.  Do you have one of the relearn tools?  If you don't, worth the $10 to make sure they are all in their correct positions - Amazon.com: VXDAS TPMS Relearn Tool el-50448 for GM Tire Sensors Pressure Monitor System Reset Tool TPMS Activation Tool OEC-T5 for Buick, Chevy, Cadillac,GMC- 2024 Edition : Automotive

 

 

2 hours ago, revrnd said:

@newdude Is the TPMS low pressure threshold a set amount below the spec or a percentage?

 

A 6 psi drop may not sound like the tire is low, but maybe it is to the system?

 

Percentage I "think".  My 2015 HD I could get the rears down to about 56psi before the light tripped.  Placard called for I think 70 or 72psi cold.  

Edited December 17, 2024 by newdude

[revrnd]

28 minutes ago, newdude said:

 

 

 

Could be two bad sensors.  Do you have one of the relearn tools?  If you don't, worth the $10 to make sure they are all in their correct positions - Amazon.com: VXDAS TPMS Relearn Tool el-50448 for GM Tire Sensors Pressure Monitor System Reset Tool TPMS Activation Tool OEC-T5 for Buick, Chevy, Cadillac,GMC- 2024 Edition : Automotive

 

 

 

Percentage I "think".  My 2015 HD I could get the rears down to about 56psi before the light tripped.  Placard called for I think 70 or 72psi cold.  

I have the same relearning tool & it's quite easy to use.

[bruceb58]

I am assuming you checked the pressure with a tire gauge to compare with what the TPMS is telling you?

[msmanuel]

I ordered the relearn tool the other day. It's supposed to be here on Saturday. Hopefully that will work. Thanks for all the feedback.

[revrnd]

22 hours ago, newdude said:

Percentage I "think".  My 2015 HD I could get the rears down to about 56psi before the light tripped.  Placard called for I think 70 or 72psi cold.  

On my 2024, I dropped the tire pressures to 50 psi all around (set to factory when towing my travel trailer). 

 

No alerts for the front tires, but both rear tires are giving low pressure warnings. I'll look tomorrow to see what the factory specs are.

[revrnd]

I just checked the tire placard for my truck & the pressures are front = 60 psi, rear = 80 psi. So obviously the 10 psi drop isn't enough to trigger the TPMS.