gates59

I was going to ask the exact same question. Does not work very well at all. My 2015 used to go high fan right away and would defrost the window much faster than my 2020. How is this truck better for the environment if I have to let my truck run 10 plus minutes longer than before. Poor programing.

Thanks for your reply. Feel a bit better its not just me.

I have a 2020 gmc sierra sle 5.3 and the ten speed and I find second gear a little slow to engage compared to all other gears. Anyone else find that. It seems fine though if I hit the throttle a little harder than normal. I don't have a heavy foot lol

No reason for you guys to complain about old software. My 2020 is on v135 and it is from January 2014. Wtf.