GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: An electric fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

Caution: To help avoid personal injury or damage to the vehicle, a bent, cracked, or damaged fan blade or housing should always be replaced.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Disconnect the cooling fans electrical connector.
  3. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
  4. Remove the right and the left engine mount struts. Refer to the following procedures:
  5. •  Engine Mount Strut Replacement - Right Side
    •  Engine Mount Strut Replacement - Left Side in Engine Mechanical-3.4L
    •  Engine Mount Strut Replacement - Right Side
    •  Engine Mount Strut Replacement - Left Side in Engine Mechanical-3.8L
  6. Remove the left front fender upper diagonal brace. Refer to Front Fender Upper Diagonal Brace Replacement in Body Front End.
  7. Remove the radiator inlet hose from the radiator.
  8. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-3.8L or Air Cleaner Assembly Replacement in Engine Controls-3.4L.
  9. Remove the PCM harness from the fan shroud clip.
  10. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  11. Remove the push pin retainer from the lower left side of the fan shroud.
  12. Remove the transmission oil cooler lines from the retainer clip at the bottom of the cooling fan shroud.
  13. Lower the vehicle.

  14. Object Number: 788121  Size: SH
  15. Remove the cooling fan shroud bolts.
  16. Disengage the cooling fan shroud clip from the top of the radiator.

  17. Object Number: 788409  Size: SH
  18. Remove the radiator upper support brackets and bolts that connect to the fan shroud.
  19. Remove the cooling fans electrical harness from the fan shroud clips.
  20. Remove the cooling fan shroud.

Installation Procedure


    Object Number: 788121  Size: SH
  1. Install the cooling fan shroud.
  2. Install the cooling fans electrical harness to the fan shroud clips.
  3. Connect the cooling fans electrical connector.
  4. Install the cooling fan shroud clip to the top of the radiator. Apply pressure in order to completely engage the clip onto the radiator.
  5. 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.

  6. Install the cooling fan shroud bolts.
  7. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 788409  Size: SH
  8. Install the radiator upper support brackets and bolts that connect to the fan shroud.
  9. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  10. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-3.8L or Air Cleaner Assembly Replacement in Engine Controls-3.4L.
  11. Install the PCM harness on to the fan shroud clip.
  12. Install the radiator inlet hose to the radiator.
  13. Install the left front fender upper diagonal brace. Refer to Front Fender Upper Diagonal Brace Replacement in Body Front End.
  14. Install the right and left engine mount struts. Refer to the following procedures:
  15. •  Engine Mount Strut Replacement - Right Side
    •  Engine Mount Strut Replacement - Left Side in Engine Mechanical-3.4L
    •  Engine Mount Strut Replacement - Right Side
    •  Engine Mount Strut Replacement - Left Side in Engine Mechanical-3.8L
  16. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  17. Install the push pin retainer to the lower left side of the fan shroud.
  18. Install the transmission oil cooler lines to the retainer clip at the bottom of the cooling fan shroud.
  19. Lower the vehicle.
  20. Fill the cooling system. Refer to Cooling System Draining and Filling .
  21. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  22. Inspect for proper operation.