Can anyone tell me if GM can tell if you had the Edge or Predator installed? I was talking to a Salesman the other day and he told me they had just come from a course on this. He told me they can tell.

I sure would like to know.

The only thing your salesman can tell is how to BS you.

When its removed, its gone

Does the computer, PCM I think, store the injector pressures for trending data? I know some programmers make the computer think it has low pressure. Just wondering. I'm not worried about it since my TST Powermax was installed at the dealership I bought it from.