[Rhyder]

Originally Posted by sycraft

It can, what did the tune do, lean it out, fatten it up, maybe cause excessive carbon buildup or a lean condition burning pistons, I am not against tunes, my silverado is tuned. but the factory tries to set it up for the best economy and prolonged life, making addl HP and changing the factory values can make differences in reliability. These new engines can be wound up pretty tight and make impressive HP reliably. They only need to cover their tune and parts, if the parameters change then they are no longer under obligation. Just like a guy who takes his car to the track and breaks a rear end, if the dealer finds out, he can deny the warranty for that failure.

Im not saying you cant mistune or cause damage wit a tune, its the statement that its possible so we void it that is the issue, if GM admited that there was a possibility that it wouldn’t, then GM would look at what was done, possible now, this isn’t the 80's anymore, and decide by that if the tune caused the issue. they don’t, they hook up a laptop, go oh no this horrible person has tuned this car in some fashion, and void it.

If we are going to void the warranty for what might cause damage without checking first, you might as well void everyones warranty in Arizona, I mean driving in 120+ conditions could cause engine failure, oh and everyone up north who puts the heavier winter tires on, no more warranty on your suspention buddy........

By just arbitrarily voiding the warranty regardless of what was done, GM is making a statement that any tune whatsoever will damage the car. By defending GM for voiding the warranty you are by default claiming the same.


If GM had come back and stated, well you tuned out the O2 sensors this happened, or you made it to lean that happened, I could see it. But to just flat out say, we don’t care how much or how little you did its voided, you are stating that any tune will cause damage. I mean you turn the O2 sensors off and suddenly the airbags arent covered?

GM tunes the engines themselves, and third party, granted supposedly under GM supervision do as well, yet if a third party outside of GM, a proffesional who has been tuning cars for many years, tunes the car, suddenly that’s the sole reason for anything going bad. Who’s to say the tune done somewhere else isn’t exactly like the tune done on GM superchargers for example? If its good enough for GM in one case it should be good enough for GM in all cases. But they don’t even check.....

So it’s not a loaded question, by just voiding it out of hand without even looking you are stating any tune whatsoever is harmful to the vehicle.

You are just eating up the line of BS GM puts out that it does, saving them millions in auto repairs, because they know, most people who buy muscle cars are going to mod them, heck, they sale them in such a way as to invite it, even touting when their car beats a competitor in races with heavily modded vehicles as examples of why you should buy theirs.


When they first stated tunes voided the contract years ago, maybe they couldn’t of pulled them as easily and seen what was done, but that stopped being the case years ago, but they haven’t changed that stupid rule because people continue to scoop up what they say like its golden truth, as if they were an unbiased source.


I still want to see some viable study from an unbiased thorough test, stating that Tunes cause more damage to these vehicles than untuned. Even GM doesn’t put that out, they simply say its so and everyone just goes along with it.