Hi all!

My wife has a grand prix addiction! She just purchased a '08 GXP after we handed down her '01 Grand Prix GT to our son.

It's an awesome car. We bought it with K&N intake, Magnaflow exhaust and Summit Doug Thorley headers already installed. Somebody put a lot of love into this thing and I can't believe we got it. Right place at the right time, I suppose.

Anyway, with all these obvious performance mods, I'm wondering if the previous owner also installed a tuned PCM or chip or something. Right? That would make sense.

Anyone got an idea of how I would tell? Could my dealer check? Or would they have flashed it back to factory during the used pre-certification process?

Any thoughts appreciated!