Posts: 12
Joined: Wed Nov 22, 2017 3:01 am

TPMS Service Light

Sat Nov 09, 2019 7:02 am

Good morning ladies/gents, I have a issue with my TPMS. Usually once in awhile the sensors on the tires wont show the tire pressure, if I drive around it comes back and resets it self. This time though it’s been a couple of days without it resetting it self. Only the rear left tire pressure is showing and the rest unknown. I remember the GM tech using a tool to reset the sensors, I was wondering if this would fix the issue.

I also see a tool on Amazon, would this work? Thanks for the help in advance.

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Posts: 91
Joined: Sat Aug 31, 2019 1:05 pm
Location: NJ

Re: TPMS Service Light

Sat Nov 09, 2019 1:56 pm

The tool is usually just to let the car know which sensor is where. The batteries may be worn out in the sensors.

Posts: 1336
Joined: Fri May 01, 2015 5:52 am
Location: KC,MO

Re: TPMS Service Light

Mon Nov 11, 2019 11:50 am

The tool is a "Relearn Tool" to tell the car system which is which.
I used my cheap amazon tool just yesterday to put my stock wheels with new tires back on the car for the coming snow. :|

You may be experiencing the TPMS sensors at the end of their battery life.
New ones are available on amazon also. That's where I got mine for my summer wheel set.
You don't have to pay tire store prices for new sensors. But you do have to pay their prices to have them installed. ;)
Either way, you should keep this safety system working on the car.
Used '14 2LT w/ DCFC. +85k miles.
Mostly free charging! Only one LONG visit to the shop....
GM needs Modern Troubleshooting tools for Modern EV's.
3 step Trouble Tree, 1st try car died again, 2nd try / cost $800. 3rd try fixed the problem.

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