So I’m back at the dealer again for the hard shift/slipping/shuddering on my denali 9 speed as the dealer thinks the shift to park recall would fix. But to think about it in engineering aspects, this is either a software issue or gearing issue. So currently it’s at the shop just gotta wait and see what they say. Perhaps it’s the same TSB as the new traverse/Acadia/enclave but well just have to see. On the bright side, they loaned us a 2020 Sierra Elevation with the 2.7T.
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