Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
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 noise 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.