I have had a few brand new GMC trucks over the last few years. 2014 5.3 6 speed SLT was pretty solid but had some clunks when downshifting. 2016 6.2 8spd Denali was also clunky at low speed downshifting the dealer reprogrammed the TCM and it was better but still did it occasionally. 2017 6.2 8spd Denali about the same as the 2016 was after reprogramming. 2018 6.2 8spd has never clunked or acted up in the 6,000 miles I have had it. This is the smoothest truck of the group and yes I like it see pic below. The only time that I ever had a delayed gear engagement was if I started the truck and immediately went to reverse or drive but it would be like 1 second or less. If I can go 1 Mississippi 2 Mississippi 3 Mississippi before gear engagement then I am not going to accept that as normal. Plus it would not make a good getaway vehicle doing that chit!
