Serpentine belt tensioner loud winding nose when the truck is on

DCTX210

MEMBER
2001 CHEVROLET SILVERADO
V8
4WD
AUTOMATIC
10,600 MILES

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.

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Drive Belt Replacement - Air Conditioning

Removal Procedure

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

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

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.

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.

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