Hello,

G.M. is taking a position on this Document. G.M. Legal is denying warranty on a 505 H.P. Z06. The vehicle had Long Tube Headers etc./ Broken Piston, they are using cvn as the basis for no warranty. I'm told they are not backing down, this will be a test case to show how business in the future will be done. ( Warranty )

Bye,


Service Information



Document ID: 2094075
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#PIP4386: Identifying Aftermarket Engine Calibrations - 2.0 2.2 2.4 2.8 2.9 3.0 3.1 3.2 3.4 3.5 3.6 3.8 3.9 4.2 4.3 4.4 4.6 4.8 5.0 5.3 5.7 6.0 6.2 7.0 7.4 8.1 - (Apr 8, 2008)




Models: 2005-2009 GM Passenger Cars and Light Duty Trucks

except Pontiac Vibe, Chevy Aveo, and All Saab Models




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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A dealer may have the need to verify engine calibrations. If a dealer feels an aftermarket power-up calibration has induced engine and/or drive train damage, there is now a way to verify what calibration is currently in the vehicle. Subject: Identifying Aftermarket Engine Calibrations


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 those that 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.

Recommendation/Instructions:
Instructions for confirming Calibration Verification Number (CVN)
• Go to TIS2WEB

• Select Calibration Information (SPS Info)

• Enter VIN

• Select "Get Cal ID"

• Select ECM Engine Control Module

• Hit "next"

• Select "Complete History"

• Print

Take Printout to Vehicle along with Tech II
• Plug in Tech II

• Go to diagnostics and build the vehicle

• Select Powertrain

• Select the engine

• Select F0 - Engine Control Module

• Select F4/F5 - I/M information System / Module ID information*

• Select F1

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

* This step may vary by controller; use the Module ID Information in the Engine Controls.

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 calibration verification numbers (CVN's) do not match the printout, it is likely that a non GM certified calibration has been installed.

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 and a PDF copy of the TIS2WEB printout should be forwarded to jay.dankovich@GM.com for verification along with the VIN and the reason the vehicle is currently in for service. Please copy your GM Area Service Manager (DVM/DSM) on the e-mail. GM will verify if the CVN's are not GM issued and respond via e-mail within 48 hours.

If both the Part numbers and the CVN are different, photograph the part numbers and CVN's on the tech 2 screen as described above, assuring the VIN shows clearly in the photograph of the TECH2 screen, and check to see if the vehicle has the latest released calibration. If the latest released calibration is not installed in the vehicle, the part numbers will not match , and the CVN's won't either. E- mail the original Part Numbers and CVN's found in the vehicle on the TECH 2 to: jay.dankovich@GM.com to check if the calibration and CVN matches a previous release. Recalibrate with the latest released cal and re-check against the part numbers and CVN's that are released.


Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2008 General Motors Corporation. All rights reserved.

 

Are you going to follow up with some serious facts? Such as, where is this Vette, what dealership, etc.? A few more facts would help determine if this is a forerunner of things to come, or a one-off incident based on a car, its owner, or its condition.

 

Wow, that sucks... Of course, my warranty runs out in November, so I'll be screwed after then anyway.

 

Wasn't this posted recently?

 

More H.P. = More stress.

 

I guess I don't understand why this is a problem. If you put a supercharger on the engine, you know you're voiding your warranty. How is changing the factory tune any different? GM may have a tune that doesn't get the MOST power for a reason -- there are parts not certified for that power.

I guess I'm on GM's side on this one. I owned a heavily modified C5. Burned a piston, damaging the block. Did I get warranty repair. Of course not!

 

In a way you can't blame them because then everyone who modifies their cars will be going to them if something goes wrong. On the other hand, I feel bad for the person who modifies their car not realizing that GM won't cover any defect.

 

And one last thing: how about the guy (or gal) who BUYS that used car, not knowing that it's been "tuned" in the past? Now, what do you do? Especially if it's NOT a GM Certified car which would/might supposedly take the next owner off the hook.

Now, when you go to look at a "used car" or used Corvette, not only do you have to do a CarFax, but a "dealerFax" to see if the car's still legit in the eyes of GM.

It gets interesting, eh?

 

I modified my car, it broke, they caught me and now they won't warranty it

 

...the memo is old news.

 

Unfortunately typical GM crap IMO.

People like to modify the cars - they JUST DO. If GM had any sort of a brain at all they would figure out what it would cost to offer a special warranty to cover certain modifications that are popular and rarely cause issues. I'm sure they could do this, and they could get A LOT of takers and more revenue.

Instead we have the "scare tactic" which won't rectify the situation, only irritate people and is a cost savings vs revenue generator.

 

Not meaning any disrespect, but I really can't understand why anyone would expect GM to warranty work done by someone else. They don't know about it, can't control it, can't test it - why in the world would they warrant it.

I have a GMPP out to 84 months and I have modded the heck out of my car. I don't expect GM to stand behind anything EXCEPT those pieces that aren't involved with my mods.

 

Some people don't believe that a tune can have detrimental effects on a car.

http://forums.corvetteforum.com/show...post1564766871

"I just don't think you understand where I am coming from. I do understand what the original post was about. I stated I agreed with it, but that it was a shame it had to come to this because a stock Vette with a tune is safe and will not break anything."

http://forums.corvetteforum.com/show...post1564762949

"Until someone can show some proof, I stand by my statement that a tune only on a C6 is very safe if a reputable tuner is used. The sky is not falling people."

Of course comments like this one below, from gonzalezfj, mean nothing to people who embrace the above ideas.

 

I am living proof that GM can void your engine warranty for headers and cats. My engine crapped out and thought it was a dropped valve that caused it. The GM rep took one look at the headers and cats and denied the claim right there on the spot.

In the end, GM's position was justified as it turned out to be a detonated piston caused by external circumstances.

You play you pay.

 

You're an honest guy, and this is a good post.

 

Couldn't agree more.

There are some on this forum, who believe that they can add every bolt on to their cars, and tune them and expect to have no warranty issues.

"In the end, GM's position was justified as it turned out to be a detonated piston caused by external circumstances."

Good thing you didn't blow money on a lawyer attempting to beat them over the head with the Magnusson Moss warranty act.

You would have lost.

 

It sure does. That is why you should get an aftermarket warranty.

 

When you buy a used car, don't you buy it "As is" No warranty?

 

I'm not sure about aftermarket warranty, danl; educate me. If there's a tune and a bunch of mod parts on the car, are they covered by say, GMPP?

 

Basically what everybody is sayin’ is if you modify anything in the drivetrain including the programming of the engine and transmission management systems and something breaks it’s on your dime. this is going to make me think hard before Itake a wrench to my new toy.