Interesting topic now that the dealer tells me there is nothing they can do for my shudder issue. They tell me the shudder I am experiencing is due to the 8cyl., wanting to go to 4 cyl. when I first start up my vehicle after it sits for a period of time. I notice this at around 30 to 35 mph. After a short period of time, it will not shudder. I don't know why when it warms up some that everything seems as it should be. To me, there should be NO shuddering at all! I bought this 2017 Silverado brand new a couple of years ago. I only have 6500 miles on it and it has done this since day one. He tells me I can't hurt it and to drive it! Anyway, next vehicle may not be a Chevy!! Mine has the little button you can push for pulling a trailer. If I push that, will it then stay in 8 cyl. mode?