You can also push the tow haul button in for 5 seconds or so & turn off the grade braking.
I have this programmer but I got it for the main purpose of turning off the afm. So I didn't really pay attention to any real performance upgrade with it. I did up the shift firmness with it to the towing firmness setting which was the lowest setting I think. Most everybody here will tell you blackbear or other tunes but for me the hypertech did what I needed.
I know everyone will say it's not my truck but a man who delivers all our nuts & bolts to my work place has a 2014 gmc cc 4x4 5.3 with around 175,000 miles now. It's his personal truck as well as work. Only thing he's had fixed is the blend door arm in the hvac broke.
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