PaulBMT

I have a 2019 Sierra with the 5.3L, 8 sp. It started doing the same thing after about 1000 miles. I have 2200 miles on it now, but it doesn't do it all the time. I never know as I'm coming to a stop if someone hit me, or it just downshifted. it would be great to get a straight answer from someone at GM. Like someone said earlier, you pay this much for a truck and you shouldn't have these kinds of issues.