looking for 4l80 tune with os #1262059
2003 chevy silverado 5.3 2wd 4l60 to 4l80 swap
looking for 4l80 tune with os #1262059
2003 chevy silverado 5.3 2wd 4l60 to 4l80 swap
You will not find one if the OS is not stock, if that is an upgraded OS like a 1 bar/2 bar etc etc, you can not do the segment swap with it.
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.