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Is there another way around a tech 2 don't know anyone with one

I have followed the instructions in the help section trying to covert to 3bar os and for some reason it doesn't save the change any help would be appreciated
also this is a gmc Sonoma with a 5.3...

I am looking just info on what does what, up till this car I have been running th400 and have not had to tune any transmission don't really know anything about tuning them and I have seen were people...

I was wondering is there a book dvd or some kind of guide out that would help me to understand tuning this transmission? Its a stock car with cai, and cat back. I went to the tuning school web site...