I just finished flashing a '0411 PCM (my first time flashing an OBDII PCM) with EFI Live. I flashed both operating system and calibrations. The original factory flash to the PCM was for 4.3 V6 / 4L60E. I flashed in a 5.7 V8 / 4L60E file. The file I flashed had the correct VIN I wanted. I read what was flashed into the PCM and I can see the changes for the 5.7 V8 / 4L60E are there. The old VIN is still in the PCM.

Thanks in advance,
dave w

 

I figured it out.

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