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Gm To Void Block Warranty If Tuned

sablowme

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sablowme Enthusiast

sablowme

Posted
Posted

Hey guys i think we knew this was comming but i was at my dest the other day and one of the mechanics had told me that i shouldnt try to sell tuners anymore cuz gm will void the warranty on the blocks. So i see the only way around this is to keep a standard pcm without a tune and then switch your tuned one out before you go to the dealer. Or just get a handheld and revert back to stock before bringing your truck into service. Either way this wont stop me from selling programers, right now with gas millage being a constant issue anything that claims better gas millage is a good seller. Espescially if the create gas millage and power what more would any one want.

longhorn_giant Enthusiast

longhorn_giant

Posted
Posted

I've read on here in a couple places that service departments can check when the tune was loaded on the GMT-900 also. This makes me very uneasy about re-loading the stock tune. I know it costs more, but I'm most likely going to get a spare ECM/TCM and put a tune on those. That way I've got the original tune with the original load date on it for when I've got to take it in.

 

It is good to know that they are for sure voiding the warranty, because I was debating whether or not the spares were worth it. But with a truck that's barely a month old I don't want to chance blowing my warranty.

Draenor Senior Enthusiast

Draenor

Posted
Posted

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.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
Can they also tell when a hand held tuner has been used?
Not a Predator ;)

 

 

:thumbs:

 

Unless your tunes somehow have OEM GM Calibration numbers?

sablowme Enthusiast

sablowme

Posted
  • Author
Posted

well, apparently one of the techs here had told me that when they enter a vehicle with the tech 2 it will show asterix by items that are apparently incorrect or been modified. Mike @ Diablo could elaborate on this, but he's right if you use a handheld and just converted your truck back to stock your pcm would look like nothing has happened to it. Again this is only on new bodystyles i belive the old ones cant do this.

 

To be honest ive had my truck in the shop before with a tune on it and didnt notice anything differnt on the tech 2, and i work with some anti-new-age techs....lol

pwall Senior Enthusiast

pwall

Posted
Posted

I never had an issue anytime I brought in the 2002 YukonXL....and the service guy knew it was tuned (he asked, was into tuning his own vechicles).

I guess if the truck had an issue that could be related to the tune, then they most likely would have said something.

 

With that, I do have a PCM module from my 2002 YukonXL that I no longer require. Anyone need a PCM ? You pay the shipping...and it's yours! ;)

Draenor Senior Enthusiast

Draenor

Posted
Posted

This is only on '06 and above years, according to the TSB. From what I have researched the CVN can be verified on older years. I guess GM is just starting to crack down on tunes.

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