Question about 2000 Chevrolet 2500

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In changing the knock sensors on 2000 suburban ,

Do you have to replace any gaskets and if so witch ones

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  • franklintrey Jul 27, 2009

    not head gaskets but intake gaskets and any other. what Im tring to find out is what all Im going to need to do the job.

  • yadayada
    yadayada May 11, 2010

    1st the number of knock sensors I have replaced in 25 years is zero, it is most likely sensing an actual engine knock, the knock sensor is in the engine block water jacket, no gaskets to replace but u will need to drain the cooling system including the engine block, also the new knock sensor must be torqued EXACTLY AS SPECIFIED OR IT WILL GENERATE ANOTHER CODE.

  • yadayada
    yadayada May 11, 2010

    why do u think the head gaskets have anything to do with the kock sensors, explain?



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If you have a 5.3 or a 6.0L engine the knock sensors ( 2 ) are under the intake manifold. You will need a set of intake manifold gaskets.

Posted on Jul 27, 2009


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Steps to replace a knock Sensors?

I had to do this last summer. First I went to Advanced Auto. They
read the code for me. One of them was bad, but I went ahead and
replaced both. I purchased a manual for the steps, two knock sensors
and a gasket set. About 170 dollars total. You will also need a torq
wrench in inch pounds. Take your time, keep it clean. Make sure
you clean the manifold and engine head surfaces where the gasket
seats. Use a non metallic scraper, and if need be solvent to loosen
any old gasket material. I found that laying saturated rags on the
head surface and leaving them set a few hours helped the most.
You can also get the steps and torque specs from either Advance
auto or Auto Zone(then you don't need the manual).
Use patience when tightening the manifold bolts, you should
torque them in the sequence given(in the manual or online) and
you have to do it twice, first time at half torque, then the second at
full torque. If you over tighten you can crack the manifold.
Good luck
Art LeDoux, Stillman Valley Illinois

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