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Yeah I had later came to the conclusion that it was locked by another tuner and bought another PCM from the junkyard.

Ok, I have a few questions here on this error... Yes I did search prior and realize this could be from the truck having been tuned by a handheld tuner previously. Also hoping I don't have to have it...

Resurrect the dead here. did yall get this figured out? if so how? I am hitting this same thing now.