Problem solved.
Thanks.
Don

Thanks,
I will do that now.
Don

I did as you said,options were.
diablo tunes
custom tunes
chose custom tunes,reinstalled tune set for myself.
Rebuted and same options came up.
Checked diablo tunes,there is an option at the end for

original backup.
Is this the factory tune??
Don

Thanks,
I will try that now.
Don

I have an 07 GT500
I am using the predator U7145
I need to return to stock for dealer visit.
instructions are not clear.
options are

import custom tune
export original backup
export last written
erase custom tune

What do I do??
Thanks Don