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Re: firm 1-2 6l80e
Posted to Transmission Forum on 11/3/2019 3 Replies

This transmission requires the "TECHM and ECM" be reprogrammed. Failure to reprogram the unit will cause vehicle drive ability issues and possible damage to the power train. Refer to "[...] [[...]]" for current calibration updates and reprogramming information... Login to read more.

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