PhysiPhile

I know some have been denied warranty work because they had a tuned ECM. When they see you have modified your car, do they log this information in their computer system so any dealership you take it to knows not to do warranty work on your car? Or do you get another try at each dealership?

EDinPA

you're done

lastcowboy

now everything is loged to gm

MARSC6

If GM denies your warranty at one dealer it won't matter where you go. Now if the dealer warns you that it won't be covered you can do something about it and head elsewhere.

PhysiPhile

I haven't tried taking the car in, but I should probably swap out the ECM if I need some major work done.

sprtplt

That will not work. They will know.

schmegeggie

It's all in the BARCODE, big brother knows....

AFVETTE

I'm told they can detect a ECM swap, something about "check digits" not matching what GM has on file but it does require them to send some data from the ECM to GM so they'd have to go out of there way to do that.

That was one reason I decided not to mod my 06 LS2 coupe and buy a 100% stock Z06. I wanted more performance but it had to be factory HP.

Tom

ben dover

If a tune is all you've done, you might get away with an ECM swap if the warranty work is unrelated to performance. if the problem concerns cosmetics or a failure of a small component you might not even need to switch the ECM. Good luck.

PhysiPhile

I have a buddy who has a buddy at a dealership (intentional ambiguity). He said they can program a new ECM after work to make everything look factory.

Wayne O

"...swap out the ECM."

If you performance modify your car be honest...be responsible for your actions. If you de-mod your car in an attempt to defraud GM you're just being a thief. I'm sorry but it is what it is.

PhysiPhile

I see your point.

But I also see no practical difference in taking a car to a dealership knowing you have voided the warranty just hoping a tech doesn't find out and trying to make it look like it hasn't been modded hoping a tech doesn't find out. The former is just more passive.

I DO see a difference if the mod is the thing that caused the failure.

lastcowboy

kind of calling the kettle black thing .honest and gm do not go together,now thief and gm does
but they will run that vin and look for any reason to void the war.

breecher_7

The ECU tracks CVN #'s. Any non GM issued CVN calibration codes and your screwed. GM is wise to the aftermarket and should not be responsible for peoples modifications hurting the cars. They started doing this in 2006 in the diesel trucks.

lastcowboy

you can fight it .K&N did and won
and that set a standard for a.m. parts they now have to prove the mod caused the prob.

cthusker

It's why I waited until my GM warranty was finished on my 06 before cranking up the HP. With 600+ hp it's now a lot more fun to drive!!

vettedoogie

Totally.

FRAUD ALERT!

It is guys like this who make it necessary to really have ANY used Corvettes checked carefully by a GM dealer to make sure of what you are buying. Getting ECMs carefully inspected and certified by the dealer can make a huge difference in repair costs down the road.

Clearly modded cars, I can understand but I wouldn't buy a used, supposedly stock Vette without doing so.

vettedoogie

I doubt K&N changed the ECM. Got a link to that news?

KenHorse

I seriously doubt you couldn't get warranty work on something totally unrelated like, let's say bad ball joints, because of an ECM tune...

RussellZ

If you changed your ECM before the tune and put your tune on the new ECM, you could put the original ECM back in before doing any warranty work. I'm not advocating fraud but I think my idea would work. I'm sure someone will set me straight if I'm wrong.