Scenario: Bought a 6L90 from a ZL1 to go into my CTS-V, can the ZL1 trans simply be flashed with the tune from my old trans using HPT or would I have to swap out the TCM in its entirety from one trans to the next?
Scenario: Bought a 6L90 from a ZL1 to go into my CTS-V, can the ZL1 trans simply be flashed with the tune from my old trans using HPT or would I have to swap out the TCM in its entirety from one trans to the next?
Ever get an answer to this?
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