4l80e swap no segment available
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Try this
The calibration I posted isn't an HPT it is really a bin file. download the file and then rename it (.bin). You can get a demo version of EFILive. Open that bin in EFILive and see if it has any parameters that are out of range.

That should show you that it is a good cal.
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Like he said further down - there are a bunch of parameters you can't see and they will be wrong and they will cause problems... been there and done that years ago...
OS 12212156 came with either segment (depending on vehicle) and either of electronic/cable throttle.
Try this
The calibration I posted isn't an HPT it is really a bin file. download the file and then rename it (.bin). You can get a demo version of EFILive. Open that bin in EFILive and see if it has any parameters that are out of range.

That should show you that it is a good cal.

Is this for a swap into your Blazer? Just get a tune (OS) from a truck/van (with same throttle control as you are using) that had a 4L80e - put in the engine parameter tables that you need (injs, MAF, etc), full flash it, and tune it from there... it's that simple.






