Silverado 1500 4WD V8-5.3L VIN B HO (2006)
6. Accessory drive component brackets that are bent or cracked will also cause the drive belt(s) to fall off.
7. Inspection of the fasteners can eliminate the possibility that a incorrect bolt, nut, spacer, or washer was installed. Missing, loose, or incorrect
fasteners may cause pulley misalignment from the accessory drive bracket(s) moving under load. Over tightening the fasteners may cause
misalignment of the accessory component bracket(s).
Step 1 - Step 12
Drive Belt Rumbling Diagnosis
Drive Belt Rumbling Diagnosis
Diagnostic Aids
Vibration from the engine operating may cause a body component or another part of the vehicle to make rumbling noise.
The drive belt(s) may have a condition that can not be seen or felt. Sometimes replacing the drive belt(s) may be the only repair for the symptom.
If after replacing the drive belt(s) and completing the diagnostic table, the rumbling is only heard with the drive belt(s) installed, there might be an
accessory drive component failure. Varying the load on the accessory drive component(s) may aid in identifying which component is causing the
rumbling noise.
Test Description
