How do you flash the pcm in your 02 Monte Carlo I change the motor in my mc from a 3.8 to a sc 3.8 and with that changed the pcmthe body module and ignition and still the security light flashes twic?

How do you flash the pcm in your 02 Monte Carlo I change the motor in my mc from a 3.8 to a sc 3.8 and with that changed the pcmthe body module and ignition and still the security light flashes twic?

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