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Tire Pressure Monitor System

pottercon

By pottercon
in Ask A GM Technician

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pottercon Enthusiast

pottercon

Posted
Posted

I have a 2007 sierra 1500 I have installed 22" wheels and 35x13.5 tires and have installed the factory sensors on the valve stems. I have tried many times resettling like my manual tells me to, but it wont get all 4 tires reset. I just want the light to go OFF. And for my display not say CHECK TIRE MONITOR SYSTEM at every start up.

Supertech64 Enthusiast

Supertech64

Posted
Posted

Does just one not reset or what?

Did you try it in a diffrent order?

Are they showing up in the display afterward or is it just showing "--", if you have that option?

 

Dealer has a tool to reset/test them quicking, it may be worth your time to visit.

pottercon Enthusiast

pottercon

Posted
  • Author
Posted
Does just one not reset or what?

Did you try it in a diffrent order?

Are they showing up in the display afterward or is it just showing "--", if you have that option?

 

I started with driver wheel and went around in the order the manual sayes to. It will set the first one and the second one ussually but run out of time on the third and the fourth. I have got the third to take a few times but never the fourth(left rear)

Supertech64 Enthusiast

Supertech64

Posted
Posted

Try starting at the LR to make sure its a good sensor and was not broken when changed to your new rims.... (If you just want the light off you can do it in any order, the order is only for computer reference to display the position on the DIC, and you can lie to it.)

 

Running out of time is weird because the countdown restarts at every tire.

 

If you keep having trouble I suggest letting the dealer do it, most of the time we do it for free at my dealership because it only takes 2 minutes or so with the electronic tool and you do not have to check air pressure afterward.

pottercon Enthusiast

pottercon

Posted
  • Author
Posted
Try starting at the LR to make sure its a good sensor and was not broken when changed to your new rims.... (If you just want the light off you can do it in any order, the order is only for computer reference to display the position on the DIC, and you can lie to it.)

 

Running out of time is weird because the countdown restarts at every tire.

 

If you keep having trouble I suggest letting the dealer do it, most of the time we do it for free at my dealership because it only takes 2 minutes or so with the electronic tool and you do not have to check air pressure afterward.

 

Thanks for your time I have spoke to my dealer awhile back he said he wasn't sure if it could be done if it didn't have the size tires on it that it came out with, and that they had to call GM to get codes, I dont know if he knows what he is talking about , might take it somewhere else.

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
Try starting at the LR to make sure its a good sensor and was not broken when changed to your new rims.... (If you just want the light off you can do it in any order, the order is only for computer reference to display the position on the DIC, and you can lie to it.)

 

Running out of time is weird because the countdown restarts at every tire.

 

If you keep having trouble I suggest letting the dealer do it, most of the time we do it for free at my dealership because it only takes 2 minutes or so with the electronic tool and you do not have to check air pressure afterward.

 

Thanks for your time I have spoke to my dealer awhile back he said he wasn't sure if it could be done if it didn't have the size tires on it that it came out with, and that they had to call GM to get codes, I dont know if he knows what he is talking about , might take it somewhere else.

 

The truck has no idea what size tires it has on it. The pressure sensors just sense pressure. It's pretty simple stuff. Any dealer that can't answer that simple question probably isn't one I'd have working on my truck.

 

As long as one (or more) of your sensors wasn't damaged during installation, you should be able to easily solve your warning display issue if you follow the relearn procedure EXACTLY as it is published.

Supertech64 Enthusiast

Supertech64

Posted
Posted

He was speaking about calibateing your PCM and EBCM to adjust your speedometer(we have to do that when we install bigger rims/tires, and if they did not come from GM accessorys they normaly do not have a calibration avaliable), not your tire pressure monitor.

 

If he was talking about the tire pressure monitor... well... find another guy to talk to at that dealer.

 

You can always learn the sensors as long as they are not broken and still the factory type proper for your vehicle, and no matter the size it should still be accurate.

 

Another note while were on the subject, you have to take it to the dealer if you want to run any pressure other than whats noted in the drivers door jam(Otherwise the light will come on for low tire pressure if you do not have it near that spec). They can use the Tech2 and set it up to look for any pressure you want to run(alot of people with 22's like to run 30psi)

LAGA Enthusiast

LAGA

Posted
Posted

There was a thread about this a couple of weeks back. I had same problem after rotating my wheels. Bottom line is most guys with the 07 cannot reset the TPMS themselfs. No matter what or how you do it yourself. It has to go back to the dealer to be hooked up to the dia. computer and they use a wand to reset the PCM. There is a TSB out for this that is over a year old and they still don`t have a fix for it. After I took mine in to get reset, I asked if I was going to have to come back next time I rotate tires and was told yes.

Supertech64 Enthusiast

Supertech64

Posted
Posted

Reset the PCM? Your dealer is feeing you a line there, it does not even go through the PCM its in the RCDLR.

 

I know the TSB your talking about, but we have not had a customer come in yet for that concern at my dealership. Here is the most important part of that TSB.

Note: While performing the pressure release method, some successful TPM relearns have been accomplished by adding or releasing air for 5-8 seconds then waiting for the horn. You may have to wait up to 30 second for the horn to sound. By only adding or releasing air for 5-8 seconds reduces the resonant vibration frequency in the valve stem and increases the possibility of the sensor sending an ID learn message. If this does not work then the J-46079 tool will need to be used to learn the sensors.
overlord1 Enthusiast

overlord1

Posted
Posted

Is it me or are these tire pressure monitoring systems more of a nuisance than anything else. I can't tell you how many people I've talked to (from many different manufacturers) who get erroneous messages from their tire pressure system. Whatever happened to people buying a $5 tire gauge and checking their own d**n tire pressure every couple of weeks? Have people gotten that lazy and stupid? I guess I shouldn't be too surprised since most Americans prefer that the government take care of them from cradle to grave. Heavens forbid you should have to expend an ounce of energy to make sure your vehicle is in safe operating condition. Sorry for the rant but I wonder when people will say enough is enough!

LAGA Enthusiast

LAGA

Posted
Posted
Reset the PCM? Your dealer is feeing you a line there, it does not even go through the PCM its in the RCDLR.

 

I know the TSB your talking about, but we have not had a customer come in yet for that concern at my dealership. Here is the most important part of that TSB.

Note: While performing the pressure release method, some successful TPM relearns have been accomplished by adding or releasing air for 5-8 seconds then waiting for the horn. You may have to wait up to 30 second for the horn to sound. By only adding or releasing air for 5-8 seconds reduces the resonant vibration frequency in the valve stem and increases the possibility of the sensor sending an ID learn message. If this does not work then the J-46079 tool will need to be used to learn the sensors.

 

 

I meant to say reset the TPMS. OOPS

minibike132 Senior Enthusiast

minibike132

Posted
Posted

You know as a tech these things are a big pain in the butt. We all took the classes that told us how they worked and that it was a federal law thing. I never really looked though. I just googled tire pressure monitoring and you can't believe the amount of energy spent so that people would know that dangerously underinflated tires were underinflated without a walk around the car. "Why does my car cost so much" well one of the reasons is we are so lazy that there has to be 4 years of congressional hearings to mandate a law that makes manufacturers liable if you can't read your tire pressure from the driver seat. :lol: Ok :thumbs: climbing off soapbox.

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