Since you do not have to rekey to travel again the GE EV-100 card is not faulting out so the problem must be what the card is not seeing causing the truck to cut out. Check your inputs to the card at the 6 screw terminals to see what you are loosing at half throttle compared to full throttle. If none of them fail then check the two bolt terminals at the 1 Rec to see if they fail.
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