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Screeching sound under the hood


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mr.dudeman199's Avatar
CF Junior Member

Join Date: Apr 2013
Posts: 49
Southwest Minnesota

May 16th, 2013, 9:50 AM   #1  
Screeching sound under the hood

My 01 silverado has been making a screeching sound under the hood lately. It does not do it all the time, but the warmer it is the more prone it is to do it. When it's warm enough to do it, it does it when it starts and then every once and awhile when I'm driving.. And also when it's warm enough outside it will squeal in 3rd gear and then when shifting to 4th it squeals again. Is it the belt? I'm not real engine savvy but I'm not clueless either, it's the 5.3l


Last edited by mr.dudeman199; May 16th, 2013 at 10:19 AM.
 
ukrkoz's Avatar
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Join Date: Mar 2008
Posts: 435

May 16th, 2013, 10:17 PM   #2  
sharing same engine and likely shared same squeals.
here's what I had done:
1. idler pulley
2. tensioner pulley
3. waterpump.

In that particular order.

Pop hood open and start the engine.
Cut a suitable length of garden hose and use it as stethoscope. Just be reasonably common sense cautious around moving parts.
#1 on the list is single bolt mount. Very easy to replace. #2 is same. #3 is about an hr labor DIY and $100 or so.

You have serpentine replaced, right? It's due at 100 000 miles. Tensioner has markings on it showing if it's stretched or not.

 
mr.dudeman199's Avatar
CF Junior Member

Join Date: Apr 2013
Posts: 49
Southwest Minnesota

May 17th, 2013, 7:41 AM   #3  
Posted By: ukrkoz sharing same engine and likely shared same squeals.
here's what I had done:
1. idler pulley
2. tensioner pulley
3. waterpump.

In that particular order.

Pop hood open and start the engine.
Cut a suitable length of garden hose and use it as stethoscope. Just be reasonably common sense cautious around moving parts.
#1 on the list is single bolt mount. Very easy to replace. #2 is same. #3 is about an hr labor DIY and $100 or so.

You have serpentine replaced, right? It's due at 100 000 miles. Tensioner has markings on it showing if it's stretched or not.
I'll have to take a look at it this weekend.. Ive been busy since it's planting season. Thanks!

 
ukrkoz's Avatar
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Join Date: Mar 2008
Posts: 435

May 17th, 2013, 8:58 PM   #4  
Any time. It's quite easy actually. Those cars, short of requiring large size tools and wrenches, are quite easy to work on. Invest into Chilton manual.

 
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