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Tire Pressure Sensors

Marty1234567

By Marty1234567
in Ask A GM Technician

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Marty1234567 New Member

Marty1234567

Posted
Posted

Hello, I have a new 2009 Sierra SLT.

The flat light and "check tire pressure" alarm go off after driving 20 minutes.

I have had it into the dealership 5 times and they changed the sensor in the tire and the rcdlr module. they updated the software in the truck and they have up dated the hand reprogramming device, T2. They have given up and say it's probably my after market amp the sub woofer causing problem. I like the truck but it seems there is no way to fix this.

Is there a way to just turn the system off so the truck will not look at the tire pressure?

How do you do it? I have a friend at the dealer who will do it if someone can tell us how.

 

 

 

Thank you.

brims Senior Enthusiast

brims

Posted
Posted

Would require access to the programming code of the BCM, which you probably won't get, as it's a federally mandated item.

Marty1234567 New Member

Marty1234567

Posted
  • Author
Posted
Would require access to the programming code of the BCM, which you probably won't get, as it's a federally mandated item.

 

Thanks, I have access to the equipment, just not sure how to do it. The mandated requires the truck to be sold with the system but I don't have to keep it.

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

That sucks -- another fine brainchild of the federal government. :cool:

 

This has got to be one of the dumbest systems I have ever seen installed in a vehicle. It would be one thing if it was just for convenience, but to flash lights in your face is just moronic.

 

What's next? A federally mandated light reminding us to breathe??? :D

 

Sorry I was no help ...... just venting .....

Nytemare Senior Enthusiast

Nytemare

Posted
Posted

Have they checked the spare tires sensor?? Sometimes it gets forgotten.

 

How long would it take you to disconnect the amp etc..just to prove its not whats wrong??

brims Senior Enthusiast

brims

Posted
Posted

When did they start putting a sensor in the spare?

 

You may not have to keep it enabled, but disabling it would be difficult. If you have access to the source code for the programming in the BCM then you would have to go through all the lines of code and find the areas that pertain to the TPMS and remove all that code the recompile the code and flash it to the BCM. There is no real equipment that you need for that except the Tech II, what you need is the code that is locked away on some computer at GM.

Stevens03 Senior Enthusiast

Stevens03

Posted
Posted

2009.. I'd take the amp out and tell them to fix it or replace it! Thats just nuts they go blaming the amp for the issue dealing with the tires.

 

Sometimes dealer excuses really piss me off. :cool:

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
When did they start putting a sensor in the spare?

 

You may not have to keep it enabled, but disabling it would be difficult. If you have access to the source code for the programming in the BCM then you would have to go through all the lines of code and find the areas that pertain to the TPMS and remove all that code the recompile the code and flash it to the BCM. There is no real equipment that you need for that except the Tech II, what you need is the code that is locked away on some computer at GM.

Since they started putting TMPS in.

 

if you swap to your spare tire and it goes flat...your still hooped...or like just about everyone...when was the last time you checked to make sure your spare had air in it....last time for me was when I had to use it.

 

Makes sense to have a sensor in there to let you know if your spare is gone flat.

brims Senior Enthusiast

brims

Posted
Posted
When did they start putting a sensor in the spare?

 

You may not have to keep it enabled, but disabling it would be difficult. If you have access to the source code for the programming in the BCM then you would have to go through all the lines of code and find the areas that pertain to the TPMS and remove all that code the recompile the code and flash it to the BCM. There is no real equipment that you need for that except the Tech II, what you need is the code that is locked away on some computer at GM.

Since they started putting TMPS in.

 

if you swap to your spare tire and it goes flat...your still hooped...or like just about everyone...when was the last time you checked to make sure your spare had air in it....last time for me was when I had to use it.

 

Makes sense to have a sensor in there to let you know if your spare is gone flat.

 

 

I've put my OTC 3833 TPMS tool up to the spare tire and came up with nothing, I checked at the stem and 180 degrees from the stem.

 

There is no place on the DIC for spare pressure readout so a sensor does no good.

 

And I do check my spare, not as often as the regular tires, but I leave it at max cold pressure so I can put it on and lower it to the right pressure.

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
When did they start putting a sensor in the spare?

 

You may not have to keep it enabled, but disabling it would be difficult. If you have access to the source code for the programming in the BCM then you would have to go through all the lines of code and find the areas that pertain to the TPMS and remove all that code the recompile the code and flash it to the BCM. There is no real equipment that you need for that except the Tech II, what you need is the code that is locked away on some computer at GM.

Since they started putting TMPS in.

 

if you swap to your spare tire and it goes flat...your still hooped...or like just about everyone...when was the last time you checked to make sure your spare had air in it....last time for me was when I had to use it.

 

Makes sense to have a sensor in there to let you know if your spare is gone flat.

 

 

I've put my OTC 3833 TPMS tool up to the spare tire and came up with nothing, I checked at the stem and 180 degrees from the stem.

 

There is no place on the DIC for spare pressure readout so a sensor does no good.

 

And I do check my spare, not as often as the regular tires, but I leave it at max cold pressure so I can put it on and lower it to the right pressure.

 

Weird...everyone I know with TPMS has a spare sensor....maybe its a Canadian thing. I know sometimes here it throws the techs for a loop cause they can never find the faulty sensor....than they remember the spare. I think the spare only comes up as a system fault though...where the other 4 come up as an individual position. Couldn't really tell you for sure...I don't have it.

brims Senior Enthusiast

brims

Posted
Posted
Weird...everyone I know with TPMS has a spare sensor....maybe its a Canadian thing. I know sometimes here it throws the techs for a loop cause they can never find the faulty sensor....than they remember the spare. I think the spare only comes up as a system fault though...where the other 4 come up as an individual position. Couldn't really tell you for sure...I don't have it.

 

Ah yes, the Canada vs US vehicle stuff. That might be the difference. Like we don't need DRLs and it's required in Canada, and yet for some reason we have them. Lucky for me there are fuses to protect the electronics, I'm using my fuse to protect the DRL circuitry from getting worn out. That's my story and I'm sticking to it.

jro909 Senior Enthusiast

jro909

Posted
Posted

the whole pressure reading system is dumb, even on the colorados if the tire drops 2 pounds it goes ballistic and throws a check engine light(on the colorado)...its nuts and dumb, it should of been an option to not have them...but thats they way things are moving sooner or later cars and trucks will tell you when to turn and when to itch your ass.

Marty1234567 New Member

Marty1234567

Posted
  • Author
Posted
the whole pressure reading system is dumb, even on the colorados if the tire drops 2 pounds it goes ballistic and throws a check engine light(on the colorado)...its nuts and dumb, it should of been an option to not have them...but thats they way things are moving sooner or later cars and trucks will tell you when to turn and when to itch your ass.

 

Thanks for all the imput guys.... If I do discover a way to disable it I will post it here.

There's no sensor on the spare here is the USA.

I think it's a great truck but the Tire Pressure monitoring system is a head of it's time as it's not robust enough for a truck.. people fix them up with different wheels and tires and change out stereo systems... For a lot of people that's half the fun of having a truck.

This system is to senitive really and has to be a lot tougher to be on a GMC if you ask me.

Pretty bad when the Technicians at the dealer can't enough figure it out......

Other than having to pull over and turn the key off and back on every twenty minutes so I can clear the alarm it's a great truck.... I only drive 17 minutes to work : )

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
there is no TPMS sensor in the spare Aiden

Hmmmm....could have sworn the techs down at the dealership was complaining about it one day...

 

Wow...maybe I was dreaming it....LOL

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