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Posted on Apr 11, 2010
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Replace knock sensor on 2001 chevy 4.8

Replace knock sensor on 2001 chevy silverado 4.8 litre please explain where it is on the motor and how much components need to be moved to replace it

  • 2 more comments 
  • Anonymous Mar 27, 2014

    knock sensor 1

  • erica eugene
    erica eugene Jul 12, 2020

    Are they 2 knock sensor on the 2011 chevy malibu 4.2

  • erica eugene
    erica eugene Jul 12, 2020

    Ok i changed the one I had but its still coming up on the machine

  • erica eugene
    erica eugene Jul 12, 2020

    Changed it but its still coming up that it need chaged

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2 Answers

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  • Master 3,092 Answers
  • Posted on Apr 13, 2010
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You have two knock sensor's, both sit under the in-take magifold on top of the engine, you will have to remove injector rail and in-take.

  • erica eugene
    erica eugene Jul 12, 2020

    I change the one I had but its still coming up on the machine

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  • Contributor 10 Answers
  • Posted on Apr 13, 2010
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There are 2 knock sensors on these motors. They are located in the valley cover under the intake manifold.

You will have to remove the intake to service them and to even be able to see them.

  • erica eugene
    erica eugene Jul 12, 2020

    I have a 4.2 2011 chevy malibu are there 2 on it

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