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    4. : How to recognize a knock sensor problem in the GMC Sierra?

How to recognize a knock sensor problem in the GMC Sierra?
Years 1999-2007

Answer

The knock sensor has the task of keeping track of the knocks that occur inside the combustion chamber, these data are then sent to the control unit and are used to optimize the use of the spark plugs. If a sensor failure is present in our GMC Sierra, we will first of all hear some sharp sounds superimposed on the fuel explosion, after which we will find the engine failure light on, an increase in fuel consumption and a lack of general power. The sensor is however easily replaceable without the need to go to the workshop.
Posted on: 8 November 2022 by ScegliAuto

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