I replaced my motor in my 01 sierra.do I have to have my ecm reset or reprogrammed for the new motor if it's the same size but different years

Asked by GuruKD7BV Dec 01, 2019 at 10:07 AM about the 2001 GMC Sierra 1500

Question type: Maintenance & Repair

1 Answer

72,045

If there are minor changes with the intake versus the old motor, or the cam timing for instance, then you should reflash the ECM.

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