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Ron Kelly (not verified)    December 3, 2024 - 1:30PM

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Hi guys. Please make sure that you only put the Mobile 1 full synthetic transmission oil in the eight speed. GM was doing that on the earlier transmissions under warranty and it solved the problem completely. I had my done and it was perfect afterwards. You may have to push the issue with your dealer or go to another one. But it is well worth it.

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