[ChevyCowboy]

I live in Canada but my dealer supports the magnuson moss act. Basically you can do whatever you want to the car and they won't void warranty. But if you have a problem with a specific component and they connected your modification as the direct cause of the failed part they will not fix that part under warranty. But say your drivers side power window stops working and you have a supercharger they will fix the window under warranty. Great dealership to deal with imo

The service manager told me all this and he's a friend of my fathers. He said some tunes will void only your power train warranty but he said they can rarely tell if a car has been tuned