Originally Posted By: Vikas
I see nothing about changing the value of the recommended PSI in the Silvarado link provided. "7. After the learn mode has been exited, adjust all tire pressures to the recommended PSI."
So, how many people own GM TECH2 ? Using that means you are changing the ECM firmware. I am assuming owner's manual does NOT show you how to do that
I own a GM Tech2 and I am a GM engineer who deals with software. The process is there but it is not listed for the public. You are NOT changing any firmware - just the calibration. This is allowed because customers DO change tires and wheel options so the system must be able to accomadate this. The Tech2 is also used to calibrate the speedo and ABS functions with different tire and wheel sizes...sadly most vehicles never get updated so people drive around on different tires/wheels sizes as delivered stock and are not realizing the full potentionaal of thier ABS not to mention the speedo being off. These changes are also calibrations - NOT firmware or software. It takes 5 minutes with a TECH2 and some aftermarket scan tools can also do it.
AND here is verbage from the GM service manual on how to set them up...
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Service Information Home Publications Number Search New Bulletins Bulletin Search Feedback Help
2006 Chevrolet K Silverado - 4WD | Sierra, Silverado VIN C/K Service Manual | Suspension | Tire Pressure Monitoring | Repair Instructions | Document ID: 1572070
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Control Module Setup
Passenger Door Module (PDM) Setup
After passenger door module (PDM) switch assembly replacement, the following procedures must be performed in the order that they appear for the Tire Pressure Monitor (TPM) System to function properly. The PDM also requires keyless entry transmitter programming after replacement. Refer to Transmitter Synchronization.
TPM System Enable
The service replacement PDM switch assembly comes with the TPM System disabled to allow the same part number PDM to be used in both TPM and non-TPM equipped vehicles. Once the TPM option is enabled in the PDM, it cannot be disabled. Before proceeding with the steps below, ensure the vehicle is equipped with TPM (UJ6). Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label.
1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With the scan tool, select Chassis.
4. Select Tire Pressure Monitor.
5. Select Special Functions.
6. Select TPM Option Enable.
7. Press the exit key to escape.
Tire Type/Pressure Selection
Since there are different tire types and pressure combinations for different vehicles, it is necessary to select the correct tire type and tire pressures for the vehicle being serviced.
1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With the scan tool, select Chassis.
4. Select Tire Pressure Monitor.
5. Select Special Functions.
6.
Select Tire Type/Pressure Selection.
7. Select P-Metric Standard.
8. Select the front tire pressure as noted on the vehicle driver door placard sticker.
9. Select the rear tire pressure as noted on the vehicle driver door placard sticker.
10. Verify the selections made are correct and press the enter key. The scan tool will flash Procedure in Progress, then display Procedure Complete.
11. Press the exit key to escape.
Tire Pressure Sensor Learn
After PDM switch assembly replacement, each of the tire pressure sensors unique identification codes must be learned into the PDM memory. Refer to Tire Pressure Indicator Sensor Learn.
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