2009 GMC Sierra, Repeated failure of TPMS!

diy_darryl · January 18, 2012

To answer other comments I'd like to add that truck is bone stock. No aftermarket wheels, radio, nothing.

I am beginning to wonder if whatever module these things report to is getting flaky and if the stabilitrak malfunction has a computer or module in common with the TPMS?

I need to get a Factory Manual.......

ChevyTech77 · January 18, 2012

To answer other comments I'd like to add that truck is bone stock. No aftermarket wheels, radio, nothing.

I am beginning to wonder if whatever module these things report to is getting flaky and if the stabilitrak malfunction has a computer or module in common with the TPMS?

I need to get a Factory Manual.......

They share nothing.

The faulty throttle position sensor put the vehicle into a reduced power mode because the motor attatched to the throttle blade then had no idea how far to open, without a good signal from the tps. Certainly wouldn't want the throttle blade doing whatever it wanted right? Right, therefore, force the throttle blade closed and keep it that way until the fault is resolved. It's called "limp mode" for a reason.

Second, the only reason your stability system notified you of ANYTHING was because it was disabled due to the tps fault. Anytime ANYTHING, in the powertrain has a fault it will ask the stability system to disable itself. Why, you ask? Simple, the powertrain is one of the biggest players in stability control of the vehicle (read: Torque reduction to drive wheels to stop wheel spin or unwanted vehicle movement) so if the engine or transmission, i.e. powertrain, is having an issue, it can't fully help the stability control system in its normal functions should a stability control event arise.

So, all in all, your tpm fault is pretty much by itself. Can the module that controls it be faulty? Sure. Can the issue you are having be due to faulty tpm sensors? Abosolutely. Could stray RF signals cause this same concern as well? You bet ya. So first off, does this issue seem to have any sort of a pattern to it? (happen in the same location, same time of day, same tire, etc)

diy_darryl · January 18, 2012

To answer other comments I'd like to add that truck is bone stock. No aftermarket wheels, radio, nothing.

I am beginning to wonder if whatever module these things report to is getting flaky and if the stabilitrak malfunction has a computer or module in common with the TPMS?

I need to get a Factory Manual.......

They share nothing.

The faulty throttle position sensor put the vehicle into a reduced power mode because the motor attatched to the throttle blade then had no idea how far to open, without a good signal from the tps. Certainly wouldn't want the throttle blade doing whatever it wanted right? Right, therefore, force the throttle blade closed and keep it that way until the fault is resolved. It's called "limp mode" for a reason.

Second, the only reason your stability system notified you of ANYTHING was because it was disabled due to the tps fault. Anytime ANYTHING, in the powertrain has a fault it will ask the stability system to disable itself. Why, you ask? Simple, the powertrain is one of the biggest players in stability control of the vehicle (read: Torque reduction to drive wheels to stop wheel spin or unwanted vehicle movement) so if the engine or transmission, i.e. powertrain, is having an issue, it can't fully help the stability control system in its normal functions should a stability control event arise.

So, all in all, your tpm fault is pretty much by itself. Can the module that controls it be faulty? Sure. Can the issue you are having be due to faulty tpm sensors? Abosolutely. Could stray RF signals cause this same concern as well? You bet ya. So first off, does this issue seem to have any sort of a pattern to it? (happen in the same location, same time of day, same tire, etc)

No pattern that I can determine. Guess we'll see what the dealer finds on Monday. I agree it seems odd that it all started occurring recently and several trips to the dealer have so far resulted in a different sensor replacement.

ChevyTech77 · January 18, 2012

Sorry to say this but unless you have mulitple failed tpm sensors (not very likely these days) it sounds like your servicing dealer is screwing the pooch on this one.

gmtech4 · January 19, 2012

haaaaa

you said pooch !!!!

lmao !!!

edit ,i got nutin else !!! lol

diy_darryl · January 23, 2012

Fault went away yesterday of course and my service appointment was this morning.

This time they replaced right rear tire sensor (have previously replaced Right Front and Left Rear). That means 3 out of my 4 sensors have been replaced in the last 2 months and that all of them have suddenly decided to fail at the same time (unlikely to me) or that the receiver module might be flaky.

They didn't want to discuss my theories and said let the mechanic have a look. Okay, fine!

No charge again at least!