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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Engine Mechanical - 4.3L) >> Diagnostic Information and Procedures >> Drive Belt Tensioner Diagnosis >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Important:  When the engine is operating the belt tensioner arm will move. Do not replace the belt tensioner because of movement in the belt tensioner arm.

NOTE: Allowing the drive belt tensioner to snap into the free position may result in damage to the tensioner.
  1. Remove the drive belt. Refer to Drive Belt Replacement .
  2. Position a 3/8 inch drive wrench on the drive belt tensioner arm and rotate the arm 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: Rotating Drive Belt Tensioner Arm Counterclockwise
    G02077656Courtesy 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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