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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1497 (Engine Mechanical - 4.2L) >> Diagnostic Information and Procedures >> Drive Belt Tensioner Diagnosis >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. 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.
  1. Remove the drive belts. Refer to DRIVE BELT REPLACEMENT   .
  2. Position a hex-head socket on the belt tensioner pulley bolt head.
  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. If any binding is observed, replace the tensioner. Refer to DRIVE BELT TENSIONER REPLACEMENT   .
  5. Install the drive belt. Refer to DRIVE BELT REPLACEMENT   .
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