Check the wiring harness for the driver's side bank fuel injectors. There's a bracket for the evap system at the rear of the head that can chafe through the harness causing all kinds of funky issues.
Happened on my Z06... once in a while I'd get a random code.... clear it and nothing would happen. One day I started the car and it **** the bed... well the harness had finally rubbed through bad enough that it was in constant contact and shorting out.
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