1974Dad

*unsatisfactory update from the tech at my dealership: He says this is the DFM cylinders deactivating and the transmission is responding. The combination results in the vibration/shudder. Considering how many people are annoyed & dissatisfied by this, you would think GM would have a fix by now. Nothing they can do in the meantime while we all wait for GM to come good on this.

I am having the exact same issue as others here with low speed vibration/shudder around 1200-1500 rpm. I also took it back to the dealer, twice in the first 10000km and, just like the others, the tech said they could not replicate the problem. Also like the others, it’s a 2023 Sierra Elevation 5.3. I also described the issue to the tech as similar to driving a standard transmission and shifting too early, resulting in a shudder. Considering the number of people with the exact same problem getting the exact same response, I am in agreement that they are fully aware of this issue and just not addressing it. Otherwise, the truck is amazing on the highway, has no issues under higher speeds, even at the same rpm, but this low speed shudder is driving me nuts to the point where I’m wondering what kind of loss I would take selling a less-than-year old truck with 11000km on it.