Sierra 1500 4WD V8-5.3L VIN Z Flex Fuel (2005)
the noise. Belt separation is identified by the plys of the belt separating, this may be seen at the edge of the belt or felt as a lump in the belt.
5. Small amounts of pilling is a normal condition and acceptable. When the pilling is severe the drive belt(s) does not have a smooth surface for
proper operation.
Drive Belt Squeal
Drive Belt Squeal Diagnosis
Diagnostic Aids
A loose or improper installation of a body, or suspension component, or other item(s) on the vehicle may cause the squeal noise.
If the squeal is intermittent, verify that it is not the accessory drive component(s) by varying their load(s), making sure they are operating to their
maximum capacity. An overcharged Air Conditioning (A/C) system, a power steering system restriction or the incorrect fluid, or a failing generator
are suggested items to inspect.
Test Description
The number(s) below refer to the step(s) in the diagnostic table.
2. The squeal may not be engine related. This step is to verify that the engine is making the noise. If the engine is not making the noise do not
proceed further in this table
3. The squeal may be an internal engine noise. Remove the drive belt(s) and operate the engine for a few seconds, this will verify if the squealing
noise is related to the drive belt(s) or an accessory drive component. With the drive belt(s) removed the water pump will not operate and the
