Question about 2002 Chevrolet Avalanche

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Chirping Noise There is a chirping noise that seems to get quieter when you push the gas pedal in. I thought it might be the belt. Spray on belt dressing doesn't help.It's a 2500 with the 8.1 litre V8

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First of all belt dressing is NO good if it was the belt making that noise it would get worst. It can be a few things, 1. I can still be the serpentine belt 2. The belt tensioner may be bad or worn bearing on it. 3. A bad water pump 4. A bad Idler pulley. 5. A bad Ac compressor.6. Bad alternator, All of the above can possibly cause this noise. What I recommend you do is remover serpentine belt and check each pull individually by spinng/turning them by hand. You should hear noise. If serpentine belt is worn/cracket replace. Here is a diagram of you belt routing. Good Luck contact if you need more help.

Posted on Dec 28, 2008

  • O Mclean Dec 28, 2008

    First of all belt dressing is NO good if it was the belt making that noise it would get worst. It can be a few things, 1. I can still be the serpentine belt 2. The belt tensioner may be bad or worn bearing on it. 3. A bad water pump 4. A bad Idler pulley. 5. A bad Ac compressor.6. Bad alternator, All of the above can possibly cause this noise. What I recommend you do is remover serpentine belt and check each pull individually by spinng/turning them by hand. You should hear noise. If serpentine belt is worn/cracket replace. Here is a diagram of you belt routing. Good Luck contact if you need more help.

  • O Mclean Dec 28, 2008

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You need to change the water pump

Posted on Dec 28, 2008

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1 Answer

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Lefty64

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