Question about 2004 Chevrolet TrailBlazer

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I have an 04 trailblazer that has a whining noise

Had the tension pulley replaced and it still there also replced the serpinteen belt.

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You need to check the other pulleys, any one can make noise when the bearing on the inside starts to go bad.

Posted on Mar 04, 2009

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Why is my car making whining noise by belts and pully


One of the accessory bearings could be going out
(I.E.-alternator,water pump,etc)If the noise is near an idler or tensioner pulley,it could also have a bad bearing.The best thing to do is remove the serpentine belt or release the tensioner pulley so the belt is loose,then you can spin each accessory pulley by hand and listen for the noise.You'll also feel the pulley dragging while you spin it and it might have a ratchety feel to it(in other words,as you're rotating the pulley you'll feel it spin somewhat freely and then it will feel as if its catching on something) If the belt itself is bad,it usually makes a squealing or chirping sound.If your vehicle has a vbelt drive with multiple belts,check the pullies the same way as described above and make sure the belts are all tight.A loose belt normally causes a squealing noise rather than a whining noise.Check your power steering fluid level too because the pump will whine if it gets low on fluid.

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REMOVE THE BELT AND TURN EACH COMPONENT BY HAND CHECKING FOR WOBBLE AND BINDING. DID YOU REPLACE THE TENSIONER ASSY OR JUST THE PULLEY?

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After replacing a timing belt on a 2006 mitsubishi galant, there is a whining noise at 1200 rpm. I've replaced the timing idler pulley, balance tensioner pulley, and the hydraulic tensioner pulley and now...


The fan belt is probly worn or dirty. Try cleaning the underside or the pullys in the serpintine route............or u mite hav to go back and chec work on the timing belt is all torqued to specs. Is belt tension rite

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Grinding coming from serpinteen belt


stop that car don't move it your pulley is failing .needing timing belt done .and new pulleys. with new tension-er.i think you have an interface engine .

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The whining sreaching sounds under the hood starts when you 1st started then after that somtimes gets louder while you driving only


Could be a pulley, belt or bearings of sort. Take it to a well referenced repair shop for proper diagnostics.

Oct 09, 2013 | 2003 Chevrolet TrailBlazer

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Whining noise in 2003 trailblazer i replaced the puly, alternater, and powersteering pump need help


Before replacing any parts, the source of the whining needs to be isolated. You can use a car stethescope or a long screwdriver and carefully place the end on various areas at the front of the engine and listen for where the noise is the loudest. Another method is to remove the serpentine belt and rotate each pulley that is driven by the belt, listen for noise and feel for rough movement.

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When the engine is running it has a very high pitched whine sound. The sound gets worse when I push on the gas pedal. We have changed the alternator, the belts, and made sure all fluids are full. The...


To see if the noise is coming from one of the accessories driven by the serpentine belt, remove the belt and run the engine for a short time. If the noise is gone, spin each one the pulleys and see if you feel any roughness or the pulley is binding. The belt tensioner pulley and the idler pulley are the most frequently ones that cause squealing noise.

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1 Answer

Whining noise


Could be a few things:

Belt slipping- adjusted through tensioning bolt on bottom of power steering pump

Pulleys- take off belt and hand turn pulleys. Find one that gives resistance and possible makes the whining noise. It's probably the idler pulley.

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A high pitched whining noise in the engine.


This Noise Description sounds Indicative of the Sounds that come from the Serpentine Belt Or Related parts such as Belt Idler Pulley or Belt Tentioner witch also has a Pulley, but if Tensioner itself is Literally BROKE I've replaced a number like this it will cause a Whining noise . Best case scenario its just the Belt, and if any of the other Problems turn out to be the Culprit the Belt MUST be Replaced Anyhow as Damage is Being caused By the Very Whining you hear.
PLEASE Spend the Extras $ for the BEST BELT as this Drives your Water pump, Alternator, A/C Compressor, Power Steering Pump All Crucial to Control of, easy Steering ,All Electrical-Power Distribution, The COOLING of Engine << VERY CRITICAL Component
The Pulleys usually have a more Hum type Whining. So I would say at Best The BELT , And WORST Belt Tentioner is Broke

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