TrailBlazer 2WD L6-4.2L VIN S (2003)
Drive Belt Vibration Diagnosis
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
3. This test is to verify that the noise is being caused by the drive belt(s) or the accessory drive components. When removing the drive belt the water
pump may not be operating and the engine may overheat. Also DTCs may set when the engine is operating with the drive belt removed.
4. The inspection should include checking the drive belt tensioner and the drive belt idler pulley bearings. The drive belt(s) may have to be installed
and the accessory drive components operated separately by varying their loads. Refer to the suspected accessory drive component for the proper
inspection and replacement procedure.