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How to Reset the Onboard Computer in a GMC Sierra Pickup?

Model: GMC Sierra MK 5 - Years: 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Warning light – error code

See other generations:
Video tutorial

In your GMC Sierra pickup, the onboard computer may occasionally show signs of malfunction, such as continuous freezes. In these cases, you can try to resolve the issue by resetting the system.

Here's how to proceed in this tutorial. First, enter the cabin, then insert the key and turn on the ignition.

Next, press and hold the microphone mute button located on the steering wheel, keep it pressed, and release it when the display turns off. At this point, just wait for the system to reboot and check if the problems are resolved.


Updated on 12 October 2026 by ScegliAuto


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by ScegliAuto

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