GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 374484  Size: SH
  1. Remove the air cleaner assembly. Refer to the appropriate procedure:
  2. •  Air Cleaner Assembly Replacement in Engine Controls - 4.3L
    •  Air Cleaner Assembly Replacement in Engine Controls - 5.0L and 5.7L
    •  Air Cleaner Assembly Replacement in Engine Controls - 6.5L (L65)
    •  Air Cleaner Assembly Replacement in Engine Controls - 8.1L
  3. Remove the air intake duct.
  4. Remove the coolant reservoir or surge tank. Refer to Coolant Recovery Reservoir Replacement or Radiator Surge Tank Replacement .
  5. If equipped with 4.3L, 5.0L, and 5.7L, remove the bolt securing the engine and transmission oil level indicator at the generator bracket.

  6. Object Number: 374491  Size: SH
  7. If equipped with 4.3L, 5.0L, and 5.7L, remove the bolt securing the engine oil fill tube at the generator bracket.
  8. Move the oil level indicator tubes and oil fill tube away from the fan shroud.

  9. Object Number: 160869  Size: SH
  10. If equipped with 6.5L, remove the wiring harness clip retainers from the fan shroud.
  11. Remove the upper fan shroud retaining bolts from the top of the radiator.

  12. Object Number: 160871  Size: SH
  13. Remove the upper to lower fan shroud retaining bolts.
  14. Remove the upper fan shroud from the vehicle.
  15. The fan shroud for the 4.3L engine will require to push the radiator intake hose aside for clearance.

  16. Remove the fan and the clutch from the engine. Refer to Fan Clutch Diagnosis .

  17. Object Number: 160873  Size: SH
  18. Remove the lower fan shroud retaining bolts.
  19. Remove the lower fan shroud from the vehicle.

Installation Procedure


    Object Number: 160873  Size: SH
  1. Install the lower fan shroud to the vehicle.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the retaining bolts to the lower fan shroud.
  4. Tighten
    Tighten the lower fan shroud retaining bolts to 8 N·m (71 lb in).

  5. Install the fan and the clutch to the engine. Refer to Fan Clutch Diagnosis .
  6. Install the upper fan shroud to the lower fan shroud.

  7. Object Number: 160871  Size: SH
  8. Install the upper to lower fan shroud retaining bolts.
  9. Tighten
    Tighten the bolts to 8 N·m (71 lb in).


    Object Number: 160869  Size: SH
  10. Install the upper fan shroud retaining bolts to the top of the radiator.
  11. Tighten
    Tighten the bolts to 8 N·m (71 lb in).


    Object Number: 183393  Size: SH
  12. If equipped with 4.3L, 5.0L, and 5.7L, reseal the engine upper to lower oil level indicator tube.
  13. • Apply RTV sealant GM P/N 12346286 or equivalent to the top end of the oil level indicator tube at the joint.
    • Install the top half of the tube into the lower half of the oil level indicator tube.

    Object Number: 374484  Size: SH
  14. Install the bolt retaining the oil level indicator tube and the transmission fluid fill tube to the oil fill tube lower support.
  15. Tighten
    Tighten the tubes lower support bolt to 4 N·m (44 lb in).


    Object Number: 374491  Size: SH
  16. Install the screw holding the oil fill tube to the oil fill tube lower support.
  17. Install the coolant reservoir or surge tank. Refer to Coolant Recovery Reservoir Replacement or Radiator Surge Tank Replacement .
  18. Install the air intake duct from the throttle body.
  19. Install the air cleaner assembly. Refer to the appropriate procedure:
  20. •  Air Cleaner Assembly Replacement in Engine Controls - 4.3L
    •  Air Cleaner Assembly Replacement in Engine Controls - 5.0L and 5.7L
    •  Air Cleaner Assembly Replacement in Engine Controls - 6.5L (L65)
    •  Air Cleaner Assembly Replacement in Engine Controls - 8.1L