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I looked it up on my code list but it doesn't list 200 series codes. Anyone have a clue? I have a 03 Z06. Thanks.
GM Code P0200 is an "Injector Control Circuit" fault. It may be a real issue as in something is amiss with your PCM controlling fueling or some wierd incompatibility with tuning software.
I see you have been tuned by my nemesis, so I'd start there with a call.