GPHusker

Lost me on that one.

I have about 850 miles on mine since the flush. Everything seems to be good. No shudder. The transmission shifts differently than it did before but in a good way. It shifts quickly and smooth. The only issue I have with any shifting is when the trans is very cold it sort of does a weird 1-2 shift the first time or two when you are slowly accelerating. I chalk that up to cold temps though.

I have had mine back from the dealer now for a couple weeks. Had my '18 in with 450 miles on it. Felt the shudder on the way home a couple of times but it appears to be gone now. My dealer didn't have the new Bosch machine but used the new fluid. I have put a few hundred miles on since the flush.

I got my truck back on Friday. The shudder is gone for now. They did the old service bulletin because they didn't have the machine to perform the new one. Lets hope this fixes it, but I am sure it will come back. At least if it does the dealer should have the new machine by then.

I have had my truck at the dealership since Wednesday. They called me Wednesday afternoon and the transmission guy agreed that I had a TCC issue. The service manager said they had been talking to GM and they are getting some of the new fluid in on Friday that is supposed to be the fix. I am supposed to pick it up sometime today. I will ask them what fluid they put in and try to get more details but it sounded like this may be the new "fix" fluid. The service manager told me he had never seen one in with this few miles though, lucky me. Edit: I forgot to add that the dealership gave me a 2019 Silverado LT Z71 to drive for the past few days. The 8 speed in that is silky smooth and feels nothing like the old 8 speed. Other than that the only things I like about it are the updated radio interface and the push button start. The rest of the truck seems cheap and the exterior and interior styling just does nothing for me. The interior styling looks great in pictures, but actually sitting in it something is just off.

I hope there can be a permanent fix. This truck purchase was one of those things where we planned on getting one exactly like I wanted now and hold on to it for longer than I have vehicles in the past. I wont be able to get my truck looked at today after all due to weather. We had a bunch of freezing rain and so the dealer obviously doesn't feel comfortable testing in in those conditions. So the plan is tomorrow now. Hopefully this gets fixed and I can start enjoying the truck. This is supposed to be the fun times in a new vehicle and not running to the dealer weekly.

I just got an '18 Silverado High Country on 1/10. With a little over 100 miles on it the TCC shudder issue started mildly. I didn't really think much of it at first but it has gotten worse. It will be at the dealer today for them to look at with 427 miles on it. This is the 2nd time in a little over a week I have had my truck in to get something repaired. The first time was the tire pressure monitoring system needed service. That happened on the way home after signing papers. To say that I am having some buyers remorse is an understatement.

I'm in the market for a new truck and drove a 2018 High Country, 2018 Denali and a 2019 LTZ Z71 yesterday. The 2019 was bouncing much more and the rear end even went sideways on a few bumps on the same route I drove the others. In both the 18's the bumps weren't even noticeable. It really turned me off on the '19. I was really wanting to like it.