GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Drive Belt Tensioner Diagnosis

Inspection Procedure

    Notice: 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.
    4. • The movement should feel smooth.
    • There should be no binding.
    • The tensioner should return freely.
  4. If any binding is observed, replace the tensioner.
  5. Install the drive belt. Refer to Drive Belt Replacement .