Possible Torque Converter Problems

[CarterMatthews]

2026 Duramax 20k miles. When coming to a stop, the Yukon "Bumps" forward. Almost feels like someone rear-ends you. The rear end also feels like it slips or shifts hard when accelerating. Not from a stop but when turning or slowing down and speeding up. We have taken it to the dealership a couple of times, and they feel it but can't find anything wrong. They mentioned if it were an early 2020s model they would swap the torque converter but don't have enough reason to swap it out yet. Any had any similar issues?

 

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[Whitebeast]

I have a 2022 refresh 6.2 that had a rumble strip feeling since I purchased it at 40k. Took it back to the Chevy dealer I purchased it from twice and all they would do is say they updated the transmission program and said everything seemed normal. I knew it was not! Recently at 50k last week it went into limp reduce power mode. I took it to a local GMC dealer rather than where I purchased from and they found the fuel pressure module was bad. They replaced that, but said after driving it the transmission did not feel right and they wanted to drop the pan an investigate. They found no metal and said it needed a torque converter. They replaced that and I paid for the filter that warranty did not cover and got it back after a week at the garage.
It was not different….and now the auto high beam, lane assist and forward collision were all unavailable. I took it back this week and long story short..sorta…they say the camera needs replaced and the valves in the transmission also need replaced. 2-3 days for part, should have it back mid next week.