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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1044 (Engine Mechanical - 6.6L (Lb7) (Introduction)) >> Diagnostic Information and Procedures >> Drive Belt Tensioner Diagnosis >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: 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.
  1. Remove the drive belt. Refer to Drive Belt Replacement .
  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.
    • The movement should feel smooth
    • There should be no binding
    • The tensioner should return freely
    4. Fig 1: View Of Drive Belt Tensioner
    GM657564Courtesy of GENERAL MOTORS CORP.
  4. If any binding is observed, replace the drive belt tensioner. Refer to Drive Belt Tensioner Replacement .
  5. Install the drive belt. Refer to Drive Belt Replacement .
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