I've been all through these trucks with gm TAC and our tech 2. If the all stock tune is present you are good to go. They do not have capability of reading past tune history even on the 2012 truck platforms.

However you can damm well bet there is a gm engineer lurking somewhere on here reading all these posts regarding way's around it so they are going to cornhole us on the next generation of truck pcms

 

They would anyway. Every new platform is getting Global A systems, so the unreadable ECMs will die out completely with the upcoming generation of every GM vehicle.

 

I dont care what people think. My GM Service manager said they can not tell. As long as its flashed back to stock they can not tell if it has ever been tuned.

 

Your service manager is correct on this one subject.

 

But like innovation always does we will find a way around it again. Don't know how many people here were deep into performance in the mid 90's but I still remember everyone tripping out about how OBD 2 was going to kill performance the apocalypse for the performance world was imminent.

Here we are 17 years later and it's better than it ever was then.

 

I will add that I too have found no proof that the current gas trucks are capable of detecting previous tunes. I've spoken with guys I know at the GM Proving Grounds and they have stated the same thing...not currently possible, but you can bet on it for next years new design.

With that said, if you tune the truck, and it damages the powertrain, you should be responsible for it and not expect GM to pay for it.

 

"Gotta pay to play" applies here. We are all big boys and girls, and should be prepared for the consiquences of our actions. IMHO, if you are in any way concerned that you won't be able to pay for a repair if your power train warrantee is voided on a major repair, KEEP YOUR VEHICLE STOCK! The day I bought my truck, I informed the service manager that I was going to do fairly extensive modifications including adding a supercharger. I am well aware that if I have an engine failer or any other powertrain problem, I'm on the hook for all repairs, and I'm just fine with that. Now, if my radio goes out and they try to claim that my engine modifications caused it, I'm going to raise a stink.

 

Sorta my thought also. After blowing apart 3 pistons and the drivers side head I had a few people ask why I didn't put it all back to stock and try and get it covered under warranty. I feel if you decide to start changing things from the way it came from the factory then that's the gamble you take and if something happens it's on you to get it fixed, not the dealership.

Have to pay to play


My truck still has the factory and extended warranty and it still will cover items as long as I can prove that what broke was not a result of something I changed. Still lots of things that can go wrong that are not related to the performance mods I have added that is nice to be covered on

 

im on the fence right now with gm accepting or declining, i have put everything back to stock programming but i dont feel my programer caused the damage. my oil pump failed and ruined the crank. being i dont drive the truck that hard, i average 18.5mpg in the hills all week long so that tells you how easy i drive it so i point the finger at gm right now on part failure. so i respectfully dissagree with myls1 and boober to a degree. but this thread was really helpful wish i would have scrolled a lil slower before i posted earlier lol

 

buy puting a tuner on or CAI or exhaust if done correctly your only making the truck run better and not choked by the epa. those things are not going to cause a falure.