Question about 2002 GMC Envoy

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The pulley that the fan is connected to and which the belt goes around is loose and making noise. Is it a bearing?

With the engine shut off I can grab the fan assembly and the whole thing is loose. The bolts holding the fan on are tight.

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  • GMC Master
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If the pulley is loose and the bolts are tight, chances are the water pump bearing has failed.

Posted on Jan 08, 2013

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Posted on Jan 02, 2017

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hfmiles
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SOURCE: my fan vibrates on my envoy, it looks like the

The tensioner pulley may be faulty. There should be a lot of tension on the pulley to keep the belt tight. If the tensioner can be moved easily, it should be replace.

Posted on Dec 21, 2010

SOURCE: Fan pulley loose,but four bolts

Hi Cro,Seems to me as if you may have a problem with your water pump. If your vehicle is loosing coolant, that will confirm it. With the engine off and the key removed from the ignition open the hood and check for any looseness in the water pump by taking hold of the fan blades and shaking back and forth (If they're plastic be careful not to apply to much force, or you may break them!). If there is play you'll need a replacement pump!Best regards Johngee10

Posted on Jul 06, 2011

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1 Answer

Makes squealing noise


You need to check the belt that drives the alternator for proper operation. The belt may be old and worn, or a pulley may be not freewheeling, but seized or with a bad bearing. Possibly the tension on the belt is too loose from a worn out tensioner.

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If the belts have not been replaced recently then this could be the cause of your problem, spray the belt with a spray or even soapy water then give you car a try if your using soapy water make sure you get the whole belt wet then try the car if the noise is then gone you know the belt is at fault.

If you have power steering then low power steering fluid can cause the power steering pump to squeek so check the level and fill it up to the highest mark then start the car and turn the wheel fully left then fully right then back to the middle then check the level again.
Low steering fluid can cause the noise you hear.

If after doing this its not the belt making the noise and neither the power steering pump then the only thing left that could cause the noise you are having is a dry bearing on one of the pulleys now this could be the alternater pulley or power steering pulley basically any pulley that the belt is running on could be causing you the noise you hear.
To stop the noise you need to buy a spray oil or spray lube then give these pulleys a good spray all around where the bearing is in the middle if the bearing gets to dry it can sieze and cause you loads of problems so go and buy a spray lube and give all of the pulleys a good spray at the front and the back try and get it in towards where the bearing is in the middle this should then stop the noise that you are hearing.

you can spray wd40 on the pulleys but remember this isnt a oil or lube it will just stop the noise for a couple of minutes so you could tell witch pulley is causing you the problem your better of buying a proper spray lube and give all the pulleys a spray where the bearing is in the middle this should then solve any noises you hear.

Make sure you check the engine oil level to rule out the noise coming from the inner workings of the engine ok


Let me know how you get on or if you need further assistance ok.

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