Hard shifting 8 speed trans

[Havasubum]

I did a quick search and couldn't find anyone with my problem.  The 8 speed trans in my 2017 Denali is increasingly shifting hard into first gear.  Occasionally it will shift hard while slowly coming to a stop at a signal during normal around town driving.  The other day I made a left turn slowly onto a street with an incline.  When I applied a light amount of power, it shifted so hard into first that my head hit the head rest.  When mentioning hard shifting to the dealer, they say that it is the nature of the beast.  I sold my 2011 Denali to my son.  I am really missing the 6 speed trans.  Has anyone else had this problem and found a fix?

 

Thanks everyone

 

Jerry

[silveradosid]

google this 16-NA-411