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Old 12-19-2012, 11:34 PM   #11
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Originally Posted by 2kg4u View Post
Uhmmm ... let'* review this. You are running the fronts 10 psi low, and the rears 40 psi low and the TPMS is telling you the pressure is low. Go figure.

I think we found the problem ... there is a loose nut behind the steering wheel.

Just yanking your chain of course. I have the same concerns about running tires up to 80 psi, but it looks like that is where they belong.
Fo sho. Plus I kinda figured the guys at Discount tire wouldve figured that out. Now, if I could just find a Torsion Unload tool here in Austin to borrow id be in good shape!!
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Old 12-19-2012, 11:39 PM   #12
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Fo sho. Plus I kinda figured the guys at Discount tire wouldve figured that out. Now, if I could just find a Torsion Unload tool here in Austin to borrow id be in good shape!!

Try Autozone. They loan out a wide variety of tools. You pay a deposit, but you get it back when you return the tool.
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Old 12-20-2012, 07:19 AM   #13
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gm design the tire pressure too high, thats why i asked specifically what it said in the door. you dont need to run that high when you arent towing anything, probably 45 front 40 rear would be the better ride but you have to deal with the light. im not sure if the dealer can change the settings on the alarm might be something to ask.
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Old 12-20-2012, 08:25 AM   #14
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The dealer can not change the settings. The goverment regulates that. That why the cars have the stupid sytem to being with. In 2008 the government said any passenger vehicle ot light truck had to have tpms on it. What ever the set pressures are for that vehicle is what they have to keep them at. Like jwfirebird said either you have to deal with the stiffer ride or deal with the light on.
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Old 12-20-2012, 11:14 AM   #15
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i wonder if the tuners can change it then?
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Old 12-20-2012, 08:22 PM   #16
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If they can that would be nice to know. If i ever run into one with a problem. Or get a vehivle that has it.
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Old 12-20-2012, 09:45 PM   #17
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i wonder if the tuners can change it then?
From what I have researched, many things outside of the PCM are controlled via the BCM. And HPTuners will NOT touch the BCM. Even the ABS bleed is done through the BCM. So, a Tech2 would be needed to change this. Well, if its programmed to be changed that is.
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Old 12-20-2012, 09:52 PM   #18
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Actually Mike the abs bleed is done though the EBCM. But i get what your saying.
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Old 12-20-2012, 10:08 PM   #19
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Now that I think about it...all components are daisy chained via the Class 2 data bus. I'll save myself some typing...

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The Class 2 system is a Serial Data Link used by GM in its vehicles, and is based on the SAE J1850 protocol, which is widely used in the U.*. It is through this data link that the body control module (or BCM) receives information and commands that are essential in determining its mode of operation.The BCM is connected, through Class 2 wiring, to the instrument panel cluster (IPC), the powertrain control module (PCM), the data link connector (DLC) and the radio.

Recently GM has now included the driver’* door module, passenger’* door module, rear seat audio controller, vehicle communication interface module or OnStar®, steering wheel audio controls, rear seat entertainment (RSE), CD changer, radio, DVD/Video, amplifier and XM radio as part of Class II. Since these new modules are part of the audio system and security system, you are now hearing more about Class II.
Connected to this same data wire is the Body Control Module (BCM), Powertrain Control Module (PCM), Transfer Case Shift Control Module, Heater & A/C controls (HVAC), Inflatable Restraint Sensing and Diagnostic Module, Theft Deterrent Control Module, Memory Seat Module, Drivers Information Center (DIC), Key/Lights/Seatbelt Chimes (most vehicles), Instrument Panel Cluster (IPC), Suspension Control Module, Electronic Brake Control Module (EBCM) and other modules.
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