Do you still have to pull a couple fuses every time you want to change the tune or was that just on the old tuners, are they now upgraded? I am looking at getting a brand new one so would I still have to do that?

It is still recomended that you pull fuses with the PPE, that said I have a few customers that don't and it has worked fine. I still always pull fuses when loading PPE tuners just to eliminate any chance of signal interference (sp).

Yes you should, specially if you have onstar.

I called PPE when i first got my tuner. I had to ask them what fuses to pull because the diagram under the lid wasn't very helpful. They just told me to leave the fuses in and make sure everything is turned off (radio, A/C) and not to touch anything when im loading. I have never had a problem.

I called PPE when i first got my tuner. I had to ask them what fuses to pull because the diagram under the lid wasn't very helpful. They just told me to leave the fuses in and make sure everything is turned off (radio, A/C) and not to touch anything when im loading. I have never had a problem.

X2 Never have pulled a fuse and have had zero issues. Only thing you might have is a code pop up after you load the program. Happens to me almost everytime I change program. Just clear it and your good.

X3 I never pulled any fuses