Here is everything step by step, here goes.

1. Plug in tuner in truck with key off and should say version etc. and also your truck tire and gear size etc.
2. Turn key to run do not start with all power stuff off in truck.
3. Go to the diagnostic option menu, not the tune (that is second way to delete VIN but were not going to do that)
4. Find "Return to Stock" and select and say yes. Make sure all power stuff is off and don,t open doors or anything while it does it's thing.
5. After complete follow instructions if they have them and turn key off and unplug turner and you should be done.
6. To test, plug tuner back in without turning key back on on and when it gets to tire, gear size etc. it should show XXXXXX and not a size and the tuner is ready for the next truck.

7. Do not plug in with key on and go to tunes or it will redownload your trucks stock tunes.

Hope this helps someone, Greg:beerchug:

Take screws out of case and look over circuits very close for burnt melted looking connections to board. If it has that the thing is fried. Take truck to reflash at dealer and start over. Junk tuner if it's burnt inside...