I swapped from a 5.3 and 4l60e to a 6.0 lq4 and 4l80e but I cant find a os that matches mine????????? my os is (12580055) I looked all over and cant find any thing can anybody help???>? heres my tune below
I swapped from a 5.3 and 4l60e to a 6.0 lq4 and 4l80e but I cant find a os that matches mine????????? my os is (12580055) I looked all over and cant find any thing can anybody help???>? heres my tune below
That's going to be a really tough one because that OS was changed in 2003 to a 12593058 OS and most likely all the 4L80e segments you'd find floating around are that.
You could maybe email support to see if they have a file or maybe someone by chance happens to have a 12580055 4L80e file to use for segment swapping.
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.
If your 2003 5.3L Trailblazer is still using OS 12580055, then it never received the final software update from a dealership, while still under warranty.
The 2003 OS software progression is as follows:
12578128 > 12579405 > 12580055 > 12593058
The easiest option, to be able to swap in 4L80 segments, would be to have your 2003 P59 PCM updated by a GM dealer - to OS 12593058.
Then as 5FDP indicated, this newer OS was more widely used by 2003 models - giving you 4L80 segment swap options.