Segments 7 and 8 (the one's that can't be changed with tuning software) are correct for that VIN. It looks like the original 4.8L LY2 4L80 calibration was reflashed with tuning software with a 5.3L...

I have a lot of 2007 and 2008 files. If you post the cal that you read out of the E38, I will look for one with the same 7 and 8 segments.

E37, E38, E67, E78, E83, E92 (and more) ECMs, are dual core processors. One of the cores is readable and writable - this contains the operating system and most of the calibration. The other core is...

TC works great with E38s - no issues. This is simply part of its quality assurance checks before flashing a different operating system - to prevent issues caused by incompatible calibrations. With...

I think in TC when you select the Force Full Program option with an E38, segments 7 and 8 must be the same in both of the calibrations, to allow the flash to proceed.

Post the cal that you read...