T43 OS 24249179 2500HD 4WD Stock File Needed ASAP

I need pickup truck stock file for 24249179 OS ASAP. This is a customers vehicle. Thanks

I read the calibration from the old tehcm and thought I could flash it to the reman unit I installed. The reman unit, however has the previous vehicles calibration still on it and because of an OS mismatch it wont flash. I get a U0100 code in the tcm, but the truck does run. I don't want to road test until I can resolve the issue. Will flashing a compatible OS file to it cure this?

Here Ya go! sorry its really late, but someone else might need it

Attachment 23784

John, Thanks.