Fan Control Circuit engine shutoff

[Lonestar10]

My understanding of the way to replace ecm -.

Download @m*m^2 from current ecm see if rawze or someone trusted has time to inspect and enter any updates.

New ecm have cummins or dealer put the correct stock program for truck on it.

Install new ecm turn key to run for 10-15 min to let ram and rom populate. Can also start and run truck for this time.

Unlock new ecm hit save. Download stock program so you have it on hand. Then upload @m*m^2 to ecm and enjoy. I believe ct uses the terms upload/download in reverse of the way I just did

Being 5 years old I would have @m*m^2 inspected.