2010 camaro ss manual 12633056 tun

Hi.
I have friend with a 2010 Camaro ss and manual gear.
Somebody has tuned the engine earlier and I do not have the stock tune file. Things like the rev limiter are defective and I have a bad feeling about the whole tun.
The os is 12633056. And I cannot find a file with this os and manual gear on internet.
Is it possible that the tuner has been put in a file from an automatic car?
Does somebody here have a stock 12633056 file, that they know for sure that comes from a manual car?
Or do you know if I can use another operating system on this car without risking to destroy anything?