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Old 10-08-2009, 08:47 PM   #15
Drives: 2SS/RS | LS3 | Black/ IO |
Join Date: Sep 2009
Location: Ohio
Posts: 21
On another thread a letter from GM was posted which discusses tuning and warranty, this letter mentioned GM service bulletins 08-06-04-033 and outlines procedures to identify the presence of non-GM aftermarket calibrations.

So, out of curiosity I did a search for the bulletin, unfortunately it didn’t provide as much info as I hoped with respect to vehicle mileage, flash counting, etc... The disturbing aspect of this is that it takes the warranty issue out of the individual dealers hands, even the district service managers hands for that matter. Anyway here it is for those interested;

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 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.
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