or not. This is the first time I've EVER seen GM state this in writing, this bulletin is for the V8's only but you can bet its going to carry over to everything very soon and no this isnt a ploy for me to sell you guys more LNF ECM's (even though its apparently the ONLY solution now LOL!)

General Motors is identifying an increasing number of engine, transmission and catalytic converter part failures that are the result of non-GM (aftermarket) engine and transmission control calibrations being used.

When alteration to the GM-released engine or transmission control calibrations occurs, it subjects powertrain and driveline components (engine , transmission, transfer case, driveshaft and rear axle) to stresses that were not tested by General Motors. It is because of these unknown stresses, and the potential to alter reliability, durability and emissions performance, that GM has adopted a policy to cancel any remaining warranty coverage to the powertrain and driveline components whenever the presence of a non-GM (aftermarket) calibration is confirmed - even if the non-GM control module calibration is subsequently removed.

Warranty coverage is based on the equipment and calibrations that were released on the vehicle at time of sale, or subsequently updated by GM. That’s because GM testing and validation matches the calibration to a host of criteria that is essential to assure reliability, durability and emissions performance over the life of the warranty coverage and beyond. Stresses resulting from calibrations different than those tested and released by GM can damage or weaken components, leading to poor performance and or shortened life.

Additionally, non-GM (aftermarket) issued engine control modifications often do not meet the same emissions performance standards as GM issued calibrations. Depending on state statutes, individuals who install engine control module calibrations that put the vehicle outside the parameters of emissions certification standards may be subject to fines and/or penalties.

This bulletin outlines a procedure to identify the presence of non-GM (aftermarket) calibrations. GM recommends performing this check whenever a hard part failure is seen on internal engine or transmission components, or before an engine assembly or transmission assembly is being replaced under warranty. It is also recommended that the engine calibration verification procedure be performed whenever diagnostics indicate that catalytic converter replacement is indicated.

In May 2009, the PQC will begin piloting a process to confirm the ECM/PCM calibration is GM issued. Beginning on May 18, 2009, the PQC will require a picture of the engine calibration verification screen, as outlined in this bulletin, before authorizing any V8 gas powered engine replacement.

If a non-GM calibration is found and verification has taken place through GM, the remaining powertrain and driveline warranty will be cancelled and notated in GMVIS and the dealership will be notified.

Plug in the Tech 2®.
Go to diagnostics and build the vehicle.
Select "Powertrain".
Select "Engine".
*Select "Engine Control Module" or "PCM".
*Select "Module ID Information" or "I/M Information System" if module ID information selection is not available.
*If "I/M information System" was selected, it may be necessary to select "Vehicle Information" in order to display the calibration information.



Take a CLEAR digital picture of the Tech 2® screen showing the engine calibration verification information as shown above.
E-mail the snapshot picture to tacsnapshot@gm.com. In the subject line of the email include the phrase "V8 Cal" as well as the complete VIN and Dealer BAC. In the body of the e-mail, inlcude the VIN, mileage, R.O. number and BAC.
Allow two hours for the PQC to verify the calibrations and set up the case details.
You may call the PQC two hours after submitting the e-mail for authorization to replace the assembly. This will provide them time to receive, review and set up a case on the request. Please be prepared to provide all the usual documentation that is normally required when requesting an assembly authorization from the PQC.
If the CVN information is displayed as "N/A", it will be necessary to contact the TCSC (1-800-828-6860 English or 1-800-503-3222 French) to obtain the CVN information.

 

well, that solves my case of what tune to get! GM performance tune..

 

Or another ECM and swap it for Dealer Visits like everyone else does I guess if a GM performance tune actually existed right now it would be a different story ROFL

 

If you believe in it, it will come.. lol

 

I'm waitin' just like everyone else

 

yeah, I have my stock tune on now, and it will stay that way until I stage. When my warranty is over I may tune myself again, but really, this is all the power I am looking for out of this car anyway. Its my daily driver. 290 hp and over 300tq is just fine.

But really, I totally support the reasons behind GM's decision above

 

I am so glad I got a second ECU!

ECU #1 Stock 235 hp

ECU #2 Tuned 290 hp

 

I have a second ECM as well. Gotta love it!!!!!!!!!!

 

how much u pay for 1?

 

X2 and is it hard to switch out if you have to go to the dealer?

 

Takes about 20 seconds to switch out, I think can safely say 99% of people on here get their LNF ECM's from me but thats about all I can say as this thread was a heads up not a sales pitch ROFL

 

ill turn my head and send a PM lol

 

Thanks again for the ECU GTPprix!

Literally takes about 20 seconds to do. WELL worth it.

 

Can you really blame them? It's like holding the car at redline until it blows up and saying you want a new one under warranty. They can't just GIVE these cars away - especially not anymore..

 

they mind as well start giving them away ESPECIALLY now lol.. there goin under anyways so **** it let the consumers get them

 

makes sense to me, not sure why they haven't been doing this all along

 

There is a problem wiht this whole pcm swapping though, if you get the gm upgrade you need the gm reflash for the sensors to work properly. tis will only let you program the lnf upgrade flash one time. so you would need both pcms programmed with the upgrade for the car to run correctly and i dnt know if that could be done.

 

couldn't one just adjust the other ECM manually?

 

In May 2009, the PQC will begin piloting a process to confirm the ECM/PCM calibration is GM issued. Beginning on May 18, 2009, the PQC will require a picture of the engine calibration verification screen, as outlined in this bulletin, before authorizing any V8 gas powered engine replacement.


this is saying that if you blow your engine .. .least from what i'm reading.. WHICH they've been doing this all along.. this isnt anything new.. there was a post last year that gm was looking for aftermarket tunes

 

exactly...this is nothing new....

lol

 

i'm gonna have someone take a picture of me giving the camera the finger. and send it to that email

 

Question about extra computer: I've heard on other cars that the manufacture will put a tamper proof seal over the ecm so if you do change it you are screwed Audi does this. So I take it that there is no tamper seal on the Cobalt? I know years ago as a lube tech, we would even put the liquid seal on stuff of we thought the person seemed shady. Please forgive me if this is a stupid question because I don't even have the car yet that was suppose to be here yesterday.

 

Yeah, that's what I've been wondering too. Somebody will need to tailor tunes to Stage 1 equipped Cobalts and HP Tuners may need to release a revision for the new O.S. too.

 

There is no seal on the stock ECM, and it can be taken on and off in seconds too.

 

if someone goes buys the stg 1 then goes to trifecta he'll get the tune just need to buy the setup and he can get it with the vin