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go over to gear head and pm eagle mark.
what? lol
every truck ive messed with as far as tbi chips is a waste. you think your going to wake it up and notice a difference well your not going to from what ive done. waste of money
go to gearhead-efi.com. create an account, send a pm to eaglemark. he is who is doing my tuning. there is also some people on there in mi and one of them might be able to do it in person.
he is also on fullsizechevy if you are on there.