GM Service Manual Online
For 1990-2009 cars only

    Object Number: 870813  Size: SH
  1. Measure the distance between the front machined face of the cylinder block and the inboard edge of the belt on the flat side at specific locations given.
  2. Tolerance:
    The tolerance is 28-31 mm (1.102-1.220 in).

  3. Dimension from the front face of the cylinder block-to-edge of belt:
  4. Important: The right front tire and splash shield will require removal.

  5. If the belt to cylinder block clearance does not fall within tolerance:
  6. • Ensure that the belt is properly located in the pulley grooves on each pulley.
    • Inspect the accessory drive belt for edge wear and replace if necessary.
    • Inspect the accessory drive pulleys for being bent or damaged.
    • Inspect the accessory components for proper shaft and bearing end play. Ensure all pulley hubs are properly installed on their shafts.
  7. Inspect each pulley radial and axial runout at belt grooves with a dial indicator:
  8. Tolerance:
    The tolerance is (Radial/Axial) 0.38 mm (0.015 in).