I am trying to read a 2007 Sierra to save the stock tune.
But everytime I start to read it, message comes up that security not cleared, then it states will retry in 11 secs. When it trys again message comes up: security timeout - delayed, after this nothing happens.
I have tried opening the key for about 30 secs then trying to read it, but the same thing hapens again.
Any advise or can you i be pointed in the right direction?
Thanks Jesse