serpentine belt tensioner loud winding nose when the truck is on

2001 CHEVROLET SILVERADO
10,600 MILES • V8 • 4WD • AUTOMATIC
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DCTX210
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My truck is making a loud winding nose when the truck is on and the noise gets louder when i press on the gas. I was told it was the lower pulley on the a/c belt. I keep getting told to take my truck to the dealer to get it fixed because it is a tricky thing to fix. What is involved on fixing this? I was told that the bearings go out on those pulleys.
May 19, 2010 at 2:16 PM
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RASMATAZ
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Drive Belt Replacement - Air Conditioning Removal Procedure


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Remove the accessory drive belt. Raise and suitably support the vehicle. Refer to Vehicle Lifting. Remove the engine shield bolts. Remove the engine shield.


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Install a ratchet into the Air Conditioning (A/C) belt tensioner adapter opening. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt. Remove the A/C belt from the pulleys. Slowly release the tension on the A/C belt tensioner. Remove the ratchet from the A/C belt tensioner. Clean and inspect the belt surfaces of all the pulleys. Installation Procedure


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Install the A/C belt around the crankshaft balancer. Install a ratchet into the A/C drive belt tensioner adapter opening Rotate the A/C belt tensioner clockwise in order to relieve tension on the tensioner. Install the A/C belt over the idler pulley. Install the A/C belt around the A/C compressor pulley. Slowly release the tension on the A/C belt tensioner. Remove the ratchet from the A/C belt tensioner. Inspect the A/C belt for proper installation and alignment.


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Install the engine shield. Notice: Refer to Fastener Notice in Service Precautions. Install the engine shield bolts. Tighten the engine shield bolts to 20 Nm (15 ft. lbs.) . Lower the vehicle. Install the accessory drive belt. https://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
May 20, 2010 at 2:56 AM