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Thomas McIver (not verified)    December 7, 2024 - 1:12AM

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I had the same issue with my 2019 GMC sierra eight speed transmission at 16,000 miles took it to GM dealer they said they changed and flushed the oil flush the torque converter and put synthetic oil in the transmission mobile one synthetic oil. So far it’s been working OK but I only have 20,000. on the truck now and my warranty expired November 2024 if General Motors knows of this issue why aren’t they doing anything about it and stop building these transmissions that have these issues?
Thanks Thomas from Savannah Georgia

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