Hi edward t,
The truck turns over but has no spark, the battery was flat so the customer tried to jump start the truck probably spiking the unit.
I have tried the ecm on a sister truck and still no spark, I also tried the good unit on the truck and it starter up. How do I go through the learn process step by step if possible.
Cheers
Pete

what is the symptom that makes you think you need an new ecm?
after you change the ecm, you will need to go through the learn processes, including the "fast tas".