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How to Reset the Maintenance Light on a GMC Sierra

Model: GMC Sierra MK 2 - Years 1999-2007
Part: Warning light – error code

If every time you start your 2004 GMC Sierra you notice the maintenance warning light coming on, don't worry because you can resolve the issue with a quick manual reset. Let's see how to do it. Ensure you start the procedure described here with the vehicle completely off and all doors closed. Then, insert the key and turn on the ignition. At the same time, press the accelerator pedal three times in a row. At this point, the reset is successfully completed, and from the next start, the maintenance light will no longer illuminate.

Updated on 13 May 2026 by ScegliAuto

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