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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1021 (Engine Mechanical - 8.1L) >> Diagnostic Information and Procedures >> Drive Belt Tensioner Diagnosis

Drive Belt Tensioner Diagnosis

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.
  1. Remove the drive belt(s). Refer to Drive Belt Replacement - Accessory  or Drive Belt Replacement - Air Conditioning .
  2. Position a hex-head socket on the belt tensioner pulley bolt head.
  3. Move the drive belt tensioner through its 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 drive belt tensioner(s). Refer to Drive Belt Tensioner Replacement - Accessory  or Drive Belt Tensioner Replacement - Air Conditioning .
  5. Install the drive belt(s). Refer to Drive Belt Replacement - Accessory  or Drive Belt Replacement - Air Conditioning .
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