Gm Locking The Pcm After 10 Reprogramms?

[gnet158]

Is this true? I've read (on the internet) that GM has built in software that will lock the PCM on 2008+ trucks (maybe cars too). Can a GM tech confirm or deny this? I have a new 08 Sierra that I bought a Hypertech Max Energy for and have programmed the 87 octaine tune. The Hypertech is suppose to copy the factory tune and hold it. However the rumor is that the newer software keeps track of how many times this was done.

 

Thanks!

[minibike132]

Is this true? I've read (on the internet) that GM has built in software that will lock the PCM on 2008+ trucks (maybe cars too). Can a GM tech confirm or deny this? I have a new 08 Sierra that I bought a Hypertech Max Energy for and have programmed the 87 octaine tune. The Hypertech is suppose to copy the factory tune and hold it. However the rumor is that the newer software keeps track of how many times this was done.

 

Thanks!

 

 

I'm not really sure what the question is, if it is does the pcm lock up after 10 recalibrations I can only guess that the answer would be no because we need to update them whenever an update is available and many modules have gone through more than 10 updates. If it is can we see how many times a recal is done the answer is yes and we can see if it is a authorized calibration or an aftermarket one.

[nbscanuck]

It sure isn't true on 2007s, I've reflashed my probably 50 times.

[gnet158]

I’ve read that using handheld programmers (Hypertech, Diablo, SuperChips ECT) on the 2008+ trucks will lock the PCM after 10 programs. GM has supposedly updated there trucks PCM to count how many times the PCM has been altered or programmed. After the 10th time the PCM locks with the factory tune.

 

I contacted Hypertech and the level one tech support guy said he talked to the tuning department manager. The manager said this will not affect their tuner. I responded asking if he’s heard anything about this. I’m waiting for his reply.

[redvett]

Here is info from GM

 

Corporate Bulletin Number 08-06-04-033 is currently available in SI.

 

Identifying Aftermarket Engine Calibrations 2.0L, 2.2L, 2.4L, 2.8L, 2.9L, 3.0L, 3.1L, 3.2L, 3.4L,

3.5L, 3.6L, 3.8L, 3.9L, 4.2L, 4.3L, 4.4L, 4.6L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L, 7.4L, 8.1L

Gas Powered Engines Only

 

Models: 2006–2009 GM Passenger Cars and Light Duty Trucks

2006–2009 HUMMER H2, H3

Excluding Pontiac Vibe, G8, Chevrolet Aveo, All Saturn and Saab Models

 

Important: This bulletin applies to Gas Powered Engines ONLY. For Diesel Powered Engines, refer to Service Bulletin #08-06-04-006A.

 

If a suspicious hard part failure is observed in the engine, transmission, transfer case or driveline, perform the calibration verification described to determine if a non-GM issued engine calibration is installed. Non-GM issued engine calibrations subject driveline components to stresses different than the calibrations which these components were validated to. Repairs to transmission, transfer case and/or other driveline components where a non-GM engine calibration has been verified are not covered under the terms of the New Vehicle Warranty.

 

Instructions for Confirming Calibration Verification Number (CVN):

 

1. Go to TIS2WEB

2. Select "Calibration Information (SPS Info)"

3. Enter VIN

4. Select "Get Cal ID"

5. Select "ECM Engine Control Module"

6. Select "Next"

7. Select "Complete History"

8. Print

9. Take the printout to the vehicle along with the Tech 2®

10. Plug in the Tech 2®

11. Go to diagnostics and build the vehicle

12. Select "Powertrain"

13. Select "Engine"

14. *Select "Engine Control Module" or "PCM"

15. *Select "Module ID Information" or "I/M Information System" if module ID information selection is not available.

16. *If "I/M information System" was selected in step 15, it may be necessary to select "Vehicle Information" in order to display the calibration information.

17. Compare the calibration ID and Calibration Verification Numbers (CVN) to the Calibration Verification Numbers (CVN) on the printout.

 

* Steps may vary by controller.

 

Although the part numbers will be the same for each, it's the CVN that will determine if the calibration is GM issued. If ALL of the CVN's are EXACTLY the same, the calibration is GM issued.

 

If the part numbers match and ANY CVN's DO NOT match the printout, it is likely that a non-GM certified calibration has been installed.

 

If the CVN information is displayed as "N/A", it will be necessary to contact the TCSC to obtain the CVN information.

 

If a non-GM calibration is found to be in the ECM (CVN's on the Tech 2 do not match TIS printout) - In order to document the case — a CLEAR digital picture should be taken of the Tech 2® screen showing the VIN and the CVN's that do not match the TIS2WEB printout. The picture, VIN and reason the vehicle is currently in for service should be emailed to [email protected] and STEVEN.R. [email protected] for verification. Please copy your GM District Service Manager (DVM) on the e-mail. GM will verify if the CVN's are not GM issued and respond via e-mail within 72 hours.

[gnet158]

Here is info from GM

 

Corporate Bulletin Number 08-06-04-033 is currently available in SI.

 

Identifying Aftermarket Engine Calibrations 2.0L, 2.2L, 2.4L, 2.8L, 2.9L, 3.0L, 3.1L, 3.2L, 3.4L,

3.5L, 3.6L, 3.8L, 3.9L, 4.2L, 4.3L, 4.4L, 4.6L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L, 7.4L, 8.1L

Gas Powered Engines Only

 

Models: 2006–2009 GM Passenger Cars and Light Duty Trucks

2006–2009 HUMMER H2, H3

Excluding Pontiac Vibe, G8, Chevrolet Aveo, All Saturn and Saab Models

 

Important: This bulletin applies to Gas Powered Engines ONLY. For Diesel Powered Engines, refer to Service Bulletin #08-06-04-006A.

 

If a suspicious hard part failure is observed in the engine, transmission, transfer case or driveline, perform the calibration verification described to determine if a non-GM issued engine calibration is installed. Non-GM issued engine calibrations subject driveline components to stresses different than the calibrations which these components were validated to. Repairs to transmission, transfer case and/or other driveline components where a non-GM engine calibration has been verified are not covered under the terms of the New Vehicle Warranty.

 

Instructions for Confirming Calibration Verification Number (CVN):

 

1. Go to TIS2WEB

2. Select "Calibration Information (SPS Info)"

3. Enter VIN

4. Select "Get Cal ID"

5. Select "ECM Engine Control Module"

6. Select "Next"

7. Select "Complete History"

8. Print

9. Take the printout to the vehicle along with the Tech 2®

10. Plug in the Tech 2®

11. Go to diagnostics and build the vehicle

12. Select "Powertrain"

13. Select "Engine"

14. *Select "Engine Control Module" or "PCM"

15. *Select "Module ID Information" or "I/M Information System" if module ID information selection is not available.

16. *If "I/M information System" was selected in step 15, it may be necessary to select "Vehicle Information" in order to display the calibration information.

17. Compare the calibration ID and Calibration Verification Numbers (CVN) to the Calibration Verification Numbers (CVN) on the printout.

 

* Steps may vary by controller.

 

Although the part numbers will be the same for each, it's the CVN that will determine if the calibration is GM issued. If ALL of the CVN's are EXACTLY the same, the calibration is GM issued.

 

If the part numbers match and ANY CVN's DO NOT match the printout, it is likely that a non-GM certified calibration has been installed.

 

If the CVN information is displayed as "N/A", it will be necessary to contact the TCSC to obtain the CVN information.

 

If a non-GM calibration is found to be in the ECM (CVN's on the Tech 2 do not match TIS printout) - In order to document the case — a CLEAR digital picture should be taken of the Tech 2® screen showing the VIN and the CVN's that do not match the TIS2WEB printout. The picture, VIN and reason the vehicle is currently in for service should be emailed to [email protected] and STEVEN.R. [email protected] for verification. Please copy your GM District Service Manager (DVM) on the e-mail. GM will verify if the CVN's are not GM issued and respond via e-mail within 72 hours.

 

If I'm reading this correctly this is more for a tune that was left on the truck when taking it in for service. Thankfully most tech's aren't very good or just lazy so I'm not to worried about leaving a tune on the truck as I'll return it to stock.

 

I received a follow up e-mail from Hypertech stating that none of their 2008 trucks have any issues with programming or returning them back multiple times. So that's good. I also asked if this were more an internet hoax, and they said it was. They said that it's the first time anyone from Hypertech heard anything like this.

 

Thanks for the reply!

[asilverblazer]

I don't think I would call it a hoax, it is a documented GM concern, and as you've read above, they CAN determine if you've tuned the vehicle.

 

I bet Jay and Steven do not like their emails posted here either.

[minibike132]

Thankfully most tech's aren't very good or just lazy

You are a dumb ass.

 

I also asked if this were more an internet hoax, and they said it was.

The module locking is a hoax. The fact that we can see the recal is not is not. No one is going to go look for a recal on anything unless there is a catastrophic failure. It's not out of laziness, it's because it takes some time to check every calibration and no one is paying that bill unless there is a failure that warrants it. That is pretty much what that bulliten states.

If a suspicious hard part failure is observed in the engine, transmission, transfer case or driveline, perform the calibration verification described to determine if a non-GM issued engine calibration is installed.

[gnet158]

I said most not all, so I don't know what's your problem. If you're a dealer grease monkey then do somthing to change the preception.

 

Thanks for clearing this up.

[Draenor]

I said most not all, so I don't know what's your problem. If you're a dealer grease monkey then do somthing to change the preception.

 

Thanks for clearing this up.

My "dealers grease monkeys" have always done outstanding work.

 

I dont know what perception you are under.

[VMax2007]

I said most not all, so I don't know what's your problem. If you're a dealer grease monkey then do somthing to change the preception.

 

Thanks for clearing this up.

My "dealers grease monkeys" have always done outstanding work.

 

I dont know what perception you are under.

 

 

 

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