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2005 Chevrolet Trailblazer Question: knocking/something dragging sound

 

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blockerj2, 4.2L 6 Cylinder, West Columbia, SC, April 28, 2009, 16:23
 Rookie

My trailblazer is giving a knocking/something dragging sound. It is especially noticeable at low speeds. I got out and looked under the hood while I left the engine running. It looks like the fan, up against the grill in the front of the car is loose/rocking back and forth. Does anybody know what this could be or do I just need to tighten some bolts. Also I have noticed that sometimes while I idle at a red light the car will shake. Any ideas? Thanks for your help in advance.

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  • Answer #1

    Russ April 29, 2009, 19:18
     Master

    You may have a worn out fan clutch or a fan blade that is out of balance.

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