Silverado 2500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
Drive Belt Tensioner: Testing and Inspection
Drive Belt Tensioner Diagnosis
1. Notice: Allowing the drive belt tensioner to snap into the free position may result in damage to the tensioner.
Important: When the engine is operating the drive belt tensioner arm will move. Do not replace the drive belt tensioner because of movement in
the drive belt tensioner arm.
Remove the drive belt.
2. Position a 3/8 inch drive breaker bar into the drive belt tensioner opening and rotate the tensioner counterclockwise.
3. Move the drive belt tensioner through it's full travel.
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The movement should feel smooth
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There should be no binding
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The tensioner should return freely
4. If any binding is observed, replace the drive belt tensioner.
5. Install the drive belt.