GM Service Manual Online
For 1990-2009 cars only

Engine Coolant Fan Replacement LA1

Tools Required

J 38185 Hose Clamp Pliers

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.

  1. Remove the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.4L.

  2. Object Number: 368749  Size: SH
  3. Remove the cooling fan harness electrical connector.
  4. Remove right side diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement - Right Side in Body Front End.

  5. Object Number: 792869  Size: SH
  6. Loosen the engine mount strut nuts.
  7. Remove the engine mount strut bracket brace bolts from the upper radiator support and rotate the struts and brackets rearward.
  8. Remove upper radiator hose. Refer to Radiator Inlet Hose Replacement

  9. Object Number: 739220  Size: SH
  10. Remove the radiator upper mount bolts (1).
  11. Remove the radiator upper mounts.
  12. Remove the cooling fan shroud bolts.
  13. Reposition the coolant overflow hose clamp at the radiator using the J 38185 .
  14. Disconnect and reposition the coolant overflow hose.
  15. Disconnect the upper TOC line from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection in Automatic Transaxle - 4T65-E.
  16. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  17. Disconnect the TOC lines from the fan module retainer clip.
  18. Lower the vehicle.

  19. Object Number: 792870  Size: SH
  20. Disconnect the engine wiring harness retainers at the engine harness bracket.
  21. Reposition the engine wiring harness.
  22. Remove the cooling fans with the cooling fan shroud.

Installation Procedure


    Object Number: 792870  Size: SH
  1. Install the cooling fans with the cooling fan shroud.
  2. Reposition the engine wiring harness.
  3. Connect the engine wiring harness retainers at the engine harness bracket.
  4. Raise the vehicle.
  5. Connect the TOC lines to the fan module retainer clip.
  6. Lower the vehicle.
  7. Connect the upper TOC line to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection in Automatic Transaxle - 4T65-E.

  8. Object Number: 739220  Size: SH

    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.

  9. Install the cooling fan shroud bolts.
  10. Tighten
    Tighten the bolts to 6 N·m (53 lb in).

  11. Install the radiator upper mounts.
  12. Install the radiator upper mount bolts (1).
  13. Tighten
    Tighten the bolts to 10 N·m (88 lb in).

  14. Install the coolant overflow hose to the radiator.
  15. Reposition the hose clamp to secure the coolant overflow hose using the J 38185 .
  16. Install the upper radiator hose. Refer to Radiator Inlet Hose Replacement .

  17. Object Number: 792869  Size: SH
  18. Position the engine mount struts brackets flush with the upper radiator support.
  19. Install the engine mount strut bracket brace bolts to the upper radiator support.
  20. Tighten
    Tighten bolts to 28 N·m (21 lb ft).

  21. Tighten the engine mount strut nuts.
  22. Tighten
    Tighten the nuts to 48 N·m (35 lb ft).

  23. Install right side diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement - Right Side in Body Front End.

  24. Object Number: 368749  Size: SH
  25. Install the cooling fan harness electrical connector.
  26. Install the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.4L.

Engine Coolant Fan Replacement LY7

Tools Required

J 38185 Hose Clamp Pliers

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.

  1. Remove the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.6L.

  2. Object Number: 368749  Size: SH
  3. Disconnect the electrical connector from the cooling fan harness.
  4. Remove right side diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement - Right Side in Body Front End.

  5. Object Number: 792869  Size: SH
  6. Loosen the engine mount strut nuts. Do NOT remove the nuts.
  7. Remove the bracket brace bolts for the engine mount strut from the upper radiator support. Rotate the struts and brackets rearward.
  8. Remove upper radiator hose. Refer to Radiator Inlet Hose Replacement .

  9. Object Number: 739220  Size: SH
  10. Remove the radiator upper mount bolts (1).
  11. Remove the radiator upper mounts.
  12. Remove the cooling fan shroud bolts.
  13. Use J 38185 to reposition the coolant overflow hose clamp at the radiator .
  14. Disconnect and reposition the coolant overflow hose.
  15. Disconnect the upper transmission oil cooler (TOC) line from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection in Automatic Transaxle - 4T65-E.
  16. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  17. Disconnect the TOC lines from the fan module retainer clip.
  18. Lower the vehicle.

  19. Object Number: 792870  Size: SH
  20. Disconnect the engine wiring harness retainers at the engine harness bracket.
  21. Reposition the engine wiring harness.
  22. Remove the cooling fans with the cooling fan shroud.

Installation Procedure


    Object Number: 792870  Size: SH
  1. Install the cooling fans with the cooling fan shroud.
  2. Reposition the engine wiring harness.
  3. Connect the engine wiring harness retainers at the engine harness bracket.
  4. Raise the vehicle.
  5. Connect the TOC lines to the fan module retainer clip.
  6. Lower the vehicle.
  7. Connect the upper TOC line to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection in Automatic Transaxle - 4T65-E.
  8. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 739220  Size: SH
  9. Install the cooling fan shroud bolts.
  10. Tighten
    Tighten the bolts to 6 N·m (53 lb in).

  11. Install the radiator upper mounts.
  12. Install the radiator upper mount bolts (1).
  13. Tighten
    Tighten the bolts to 10 N·m (88 lb in).

  14. Install the coolant overflow hose to the radiator.
  15. Using J 38185 , reposition the hose clamp to secure the coolant overflow hose.
  16. Install the upper radiator hose. Refer to Radiator Inlet Hose Replacement .

  17. Object Number: 792869  Size: SH
  18. Position the engine mount struts brackets flush with the upper radiator support.
  19. Install the brace bolts to secure the engine mount strut bracket with the upper radiator support.
  20. Tighten
    Tighten bolts to 28 N·m (21 lb ft).

  21. Install the engine mount strut nuts.
  22. Tighten
    Tighten the nuts to 48 N·m (35 lb ft).

  23. Install right side diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement - Right Side in Body Front End.

  24. Object Number: 368749  Size: SH
  25. Connect the cooling fan harness electrical connector.
  26. Install the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.6L.