Tried that and two different companies flashed them incorrectly. Another sent me a bad ECM. Finally ponied up and bought one from Cummins, dealer flashed it and it was done in 24 hours. This after three months of smaller shops diagnosing and then changing their diagnosis. New ECM is working and the truck runs better than ever.
Symptoms- No wait to start light, very touch accelerator but idles normal, no wipers, no acceleration when pressing on pedal.