No result w the search. What is a B9901 "block ECM caliberation"patch

[mega2006]

Just downloaded the updates and with my tune open I have at the very bottom a Operating System Patchs button in red. In that I have a Applied /Not Applied button for a B9901 block ECM caliberation what is this and should it be applied? Whats it for? I read the help box.....which I still dont get. Thanks

[DoghouseDiesel]

It's a red folder, correct? It's just something you'll see if you have the file opened and theV2 is connected to the truck.

If you lock the ECM, you juts won't be able to read that file until you overwrite it again.

[TexasCummins]

Yep, keeps computers from being able to read the tune in the ECM until you flash it with that setting disabled.