2004 Chevrolet Silverado continuous chirping noise

Tiny
DOEDOE92
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • 6.0L
  • V8
  • AWD
  • AUTOMATIC
  • 80,000 MILES
My cousins 04' SS Silverado has been making a chirping noise for a few months. The oldest work done 18 months ago was the power steering pump. But this noise was until a few months ago. I changed the belt tensioner, the idler, water pump, removed ac tensioner belt as well thinking it may have been that but the noise continues. Doubt it has anything to do with the larger serpentine belt that was required for a bigger watt alternator. I don't know. What could the chirping noise be? It sounds like ifs from the front of the motor by the pulleys.
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Tuesday, November 26th, 2013 AT 7:15 PM

3 Replies

Tiny
CARADIODOC
  • EXPERT
Sprinkle a little water on the smooth backside of the belt while the engine is running. If the noise changes, it's belt-related. Look for any pulley that's turned or tipped. If you sight down the pulleys, you should not see the belt peeking out to one side even 1/16" on any one of them. If it is, that means the belt has to walk sideways across a pulley as it goes around it. Normally that causes a squeal.

Chirping can be caused by tiny rocks and other debris embedded in the smooth backside of the belt. You have to be very careful, but if you hold the sharp end of a flat file lightly against the belt where it goes around a grooved pulley, you'll see little sparks each time a rock chip hits it. If you hold more pressure on the file, eventually those chips will fall out.
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Tuesday, November 26th, 2013 AT 8:35 PM
Tiny
ZJAVINK
  • MEMBER
I have been having the same thing. Replaced the serpentine belt and idler & tensioner pulley. That did the trick for about 1 month but it's happening again?
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Saturday, October 11th, 2014 AT 3:48 AM
Tiny
CARADIODOC
  • EXPERT
The only thing I can add is if any type of belt dressing was used previously, scrub all the pulleys with soap and water, then install a new belt. No belt dressing products must ever be used with serpentine belts because small rocks and debris will stick to the belt and become embedded in it. That will set up more squealing.
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Saturday, October 11th, 2014 AT 11:53 PM

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