im trying to do a segment swap for a friend and cant seem to hit on a compatible OS for it. OS is 5120003 and trans ID is 12582835, ive downloaded ever tune in the prepo trying to find a match and have had no luck, plenty of 33s and 37s but no 35s. trying to avoid doing a different OS completely but so far no luck at all. Any help would be greatly appreciated.
That OS isn't a stock OS, do you have that guys stock file you can reference to see what that says?
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
5120003 looks like an EFI Live COS number. What is the year and make/model of the vehicle and VIN #?
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