I know I should have done "write entire"... I messed up. This is the situation: Started with a 411 pcm from a 2001 Chevy Express 3500 5.7L31 / 4l80e, VIN 1GCHG39R111176861. Read just fine in the vcm suite. Wrote just the calibration file from 411 pcm from a 2002 Chevy Express 1500 5.7L31 / 4l60e, VIN 1gbfg15r421139312. Seem to go fine... until I tried to read it, "Detect Protocol Failed". If I try to write to it, "Controller Unlocker: Timed Out". I bought credits to unlock the 2001 Express tune that I wanted to use, then after everything failed, I bought credits and unlocked the original tune to the pcm I was trying to write to. So now I have $200 into it and nothing. These two pcm's should be identical, but I see one difference: The 3500 has o/s 12208322 and the 1500 has o/s 12212156. Does this effect it?? Is it possible to recover this and if so how?? I know if I would have done write entire, all would have been fine. I tried killing power to pcm for 1/2 hour... Same results. Did I brick it??
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