A little bit of background, I had a decent amount of experience tuning the Gen III 4L60's, and when I purchased my new 2016 sierra with the A6 I was blown away at the amount of tables in the transmission section. I did purchase a "tuning book" from a very very well known company and applied the theory and settings they had to offer into my tune. The truck runs absolutely PERFECT with the exception of the 2-3 upshift, it hits so dang hard it's just not pleasant to drive. Under very light load it shifts smooth, and under 3/4-WOT it shifts great, its right in the middle is where i'm having the issue. I have tried extending the shift time longer, didn't help, I've tried lowering line pressure, didn't help. I've tried everything I thought would work, with no solution. I've tried everything I can think of and I am now here to see what help I can receive. If needed i'll get some scans and post, I can also post my current tune file if needed. Wasn't sure if someone knew right away what setting might help that i'm not seeing. Thank you.
**** Currently the truck is lifted with 35" tires with stock 3.42 gears, so shift points are adjusted quite a lot, intake, exhaust and that's it. ****