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2008 GMC Sierra 1500 Question: Loud Squeaking Noise



Polkster, 5.3L V8, Gretna, LA, January 17, 2010, 12:40

There is a bloud squeaking noise coming from the belt and pully area, it is continous. What would be the best guess as to what the problem is?

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  • Answer #1

    January 17, 2010, 17:28

    As an automotive technician, I don't like to guess, I prefer to diagnose. Guessing will almost always result in replacing un-needed parts.
    You can try spraying the belt with a quick shot of WD40 or silicone spray, if the noise goes away, you have a bad belt or the alignment of the pulleys is off.
    The key is to locate the source of the noise, you have a lot of rotating parts in the belt area, waterpump, alternator, p/s pump, idler bearings etc. and all these can make noise. I use a stethoscope and carefully listed to each part and try to locate the noisy part, this can be done with a large screwdriver too, but be very very careful!

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    Visitor, June 26, 2011, 13:21

    I have the same problem with my truck!!

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