Question about 2000 GMC Yukon XL

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My 2000 yukon knock sensor code came up. the shop said $ 700 to replace. the 5.3 motor runs great. Does this need replacing?

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  • FUBAR Mar 22, 2011

    There is a technical service bulletin on this....
    Google this # 02-06-04-023A and it should come up for you...
    If you don't repair it it may cause damage over time.

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The engine has two knock sensors they are mounted under the intake manifold, $700 sounds a bit high , i think i would price around, as to the question do you have to replace them, NO, but they are there it aid in the ignition control if the engine spark knocks these sensors are there to sense this. and also if one of the sensors is always reading as if the engine is spark knocking then the on-board computer will keep trying to ****** the timing and this will effect you power, and fuel millage.

Posted on Mar 22, 2011

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Thats a rediculus estimate considering the part is only $50.00. Thats $650 for labor. The knock sensor is a fairelly easy part to replace, its screw in screw out procedure and disconnect of the vacuum line. When not replaced, vehicle may experience engine ping or knock, high emissions, poor fuel economy, internal engine damage and/or CEL/MIL illuminationne.

Posted on Mar 22, 2011

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  • Then, unscrew the sensor.
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  • 15 ft.lbs.torque
  • hope this helps.Thank You for using fixya..iluv2fish.. Ray..

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