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Drive Belt Squeal Diagnosis

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Drive Belt Squeal Diagnosis

Step Action Yes No
DEFINITION: The following items are indications of squeal:
  • A loud screeching noise that is caused by a slipping drive belt-This is unusual for a drive belt with multiple ribs.
  • The noise occurs when a heavy load is applied to the drive belt, such as an air conditioning compressor engagement snapping the throttle or slipping on a seized pulley.
1 Check for a misaligned pulley.
Is there a pulley misaligned?		 Go to Step 3  Go to Step 2 
2 Check for correct drive belt length.
Is the drive belt the correct length?		 Go to Step 4  Go to Step 5 
3 Repair or replace with new parts as necessary.
Is the repair complete?		 System OK -
4 Check the drive belt tensioner for proper operation.
Is the drive belt tensioner operating correctly?		 Go to Step 3  Go to Step 5 
5 Check for correct pulley size.
Are the pulleys the correct size?		 Go to Step 6  Go to Step 3 
6 Check for seized bearings.
Is there a seized bearing?		 Go to Step 3  System OK
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