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  1. #1

    Default Knocking noise need help

    I have a 96 silverado with the 5.7 When I start it up it has a knocking sound that is fairly loud coming from the motor. The oil level is good. The check engine light is on due to an o2 sensor would this have anything to do with it? What could it be?

  2. #2
    Legend unplugged's Avatar
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    Default

    Does the knock go away after it warms up?
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  3. #3

  4. #4

    Default

    im guessing its the piston slap problem

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