Sparkplug

My 2017 had the shudder at 7000 miles. I never questioned what the dealer did, as it has not in the 57,000 miles since acted up. Come back. They supposedly changed the torque converter, and reprogrammed the computer. I lost about 2 mpg, afterwards. I even added a chip. My brotherinlaw had a 2017 Silverado Z71, that had an 8sp in it, that he had GMs lemon law used on. Mine shifts on the 1-2 shift hard at times as well as downshift at times. I like a firmer shift anyways, but not the bang in. Reverse is hesitant on cold start up. As far as programing goes you will have to live with it. I was going to have a chassis tune, done, and found out the COMPUTER was LOCKED and had to be unlocked first. But thats GMs control, over you

Mine does the same thing. I have a 2017 SLT Canyon, that seems to bother most when it is misting out/raining. The goofy release engineer does not care about your problem. It has not been corrected either. Thats the plain and simple. I took mine in with readings from a temperature probe installed in a vent so the video could see it as well as the selections for the heater, and they said there hands are tied, its a GM problem. When soaking wet in the summer and it blows cold air at you from the vents, you notice/know it. I think a Honda is in my future after I get rid of this Canyon for that reason. The 8 sp problems I could live with. You may also wonder why the gas mileage is so low.. The air cond is running. You don't have a lemon, and if everybody pays attention they will find it to be TRUE also.