2015 Silverado - "Tow/Sport" trans adjustments not working

[Brad_1983]

I've been toying around with the transmission settings (pressure and shift rpm) and saw there are separate setting for "tow/sport" mode. In my 2015 Silverado, I took this to mean that, if I push the "tow haul" button on my shifter, it would transition to these settings. For example, I wanted to have a higher shift pressure and higher shift rpm in tow/haul mode... It seems that, after I changed the setting, pressing the tow haul button didn't change a thing. Still shifted at the "regular" rpm.

So, engineers... is this a feature that is supposed to work the way I describe or am I mistaken?

[mikel]

please adjust the tunes, load itto the truck, and post the tune files from the tunes folder on the i2 drive here.

Thanks

[Brad_1983]

I plan to up the trans pressure and re-program again. Once I do, I'll upload the file you requested.

Thanks