Does anybody know if there's an easy way to program injector calibrations into the ecm AND gpm? Right now, they're both empty. When I try to read, they both say "no data"

I had "injector calibration incorrect" codes, and was following instructions on another forum. Now I think I just ended up completely wiping the data.

And could those injector calibrations codes even have been what was stopping the truck from starting in the first place?

I just keep falling farther and farther down the rabbit hole...