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For some reason your question has been lock by customer service.
What is the issue you are having?
Are you looking for a the electrical diagram for the the fuel system? Or the fuel and evap system?
Which truck do you have? Which engine?
They have a wiring diagram, but do not have an evap diagram.
If the pump is on you should have fuel pressure. You have zero fuel pressure? Have you checked the fuel filter? If there fuel?
Have you checked your pressure at the filter?
Have you replaced the ecm recently? what issue are you having that you think is because of the ecm?
What kind of code reader are you using?