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Old 11-06-2009, 12:34 PM   #22
Drives: 09 Vette GT1, 06 350Z, 82 MSE
Join Date: Jul 2009
Location: Oklahoma
Posts: 573
Originally Posted by axis View Post
Can you show me where GM REQUIRES anything, before drivetrain warranty work can be done? The only bulletin that i've seen, addressing this issue, says they are required ONLY if the dealer wishes to document the case which I assume means they want to deny warranty work. Now if something else has come out, i'd like to see it.

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: 20062009 GM Passenger Cars and Light Duty Trucks
20062009 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 JAY.DANKOVICH@GM.COM and STEVEN.R. BRIDSON@GM.COM 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.

So if everyone can agree that the flash counter is disabled and if putting the stock tune back in wipes all traces of the "tune", then it's safe to say they can't see it at the dealership. It appears as though you don't have to send the ECU in, just the CVN's, so how is GM suppose to see anything from a report that the dealer can't see?
I'm guessing it depends on the situation and the dealer...but really, will you know that you've got the right dealer at the right time when you take in your car. GM is cracking down on warranty fraud as it has increased as dealers have struggled to make ends meet during these lean times. If a customer comes in with "xxx" problem and I can turn it from a $100 bill to GM into a $1000 bill with GM I can pay my bills. This is what has driven GM to ask for verification.

When I was a tech, I found that it was safer to document everything because you never knew when you were going to be the "lucky" one to get to answer questions on an audit from the regional service person. If you couldn't prove your situation...guess what...the dealer ate it. It's much like that now, GM may require the dealer to call in for approval for certain repairs...and that approval usually requires screen shots.

We had this happen in the early days of the LS-1 in the F-Body...remember how they were bending pushrods? We had to document the hell out of those engine replacements as the cost to GM was pretty extreme.

I'm not trying to say that GM is looking at EVERY repair...but it truly is a luck of the draw and I don't know that I'd want to play those odds. Usually at the point you find out you are denied, they are pretty far into whatever they are looking at and you are stuck with fix it there on your dime or pick up your car in boxes, pay tear down time and go somewhere else.
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