LaCrosse V6-3.8L VIN 2 (2005)
Drive Belt: Testing and Inspection
Drive Belt Rumbling
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 may have a condition that can not be seen or felt. Sometimes replacing the drive belt may be the only repair for the symptom.
If replacing the drive belt, complete the diagnostic table, and if the noise is only heard when the drive belt is installed, there might be an accessory
drive component with a failure. Varying the load on the different accessory drive components may aid in identifying which component is causing the
rumbling noise.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This test is to verify that the symptom is present during diagnosing. Other vehicle components may cause a similar symptom.
3. This test is to verify that the drive belt is causing the rumbling noise. Rumbling noise may be confused with an internal engine noise due to the
