GM Service Manual Online
For 1990-2009 cars only

Engine Coolant Fan Replacement L36

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. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the upper radiator support bar. Refer to Radiator Support Replacement in Body Front End.

  3. Object Number: 165592  Size: SH
  4. Disconnect the wiring harness electrical connector from the motor and the fan bracket.

  5. Object Number: 420680  Size: SH
  6. Remove the transaxle oil cooler pipe bracket bolt from the fan shroud.
  7. Remove the two fan mounting bolts.
  8. Lift the fan assembly off the lower holding tabs and remove from the vehicle.

Installation Procedure


    Object Number: 130726  Size: SH
  1. Install the fan assembly and insert into the lower radiator holding tabs.
  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 electric cooling fan mounting bolts.
  4. Tighten
    Tighten the bolts to 9 N·m (80 lb in).


    Object Number: 740543  Size: SH
  5. Align the transaxle oil cooler pipes with the routing features (1, 2) on the fan shroud.

  6. Object Number: 420680  Size: SH
  7. Install the transaxle oil cooler pipe bracket bolt to the fan shroud.
  8. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 165592  Size: SH
  9. Connect the wiring harness electrical connectors to the fan motors.
  10. Install the upper radiator support bar. Refer to Radiator Support Replacement in Body Front End.
  11. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

Engine Coolant Fan Replacement LD8

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure

  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the upper tie bar. Refer to Front End Upper Tie Bar Replacement in Body Front End.
  3. Drain the coolant. Refer to Cooling System Draining and Filling .

  4. Object Number: 420680  Size: SH
  5. Remove the engine oil cooler line bracket to fan shroud bolt.
  6. Remove the engine oil cooler line bracket.

  7. Object Number: 566627  Size: SH
  8. Remove the transaxle oil cooler pipe bracket to fan shroud bolt.
  9. Remove the upper transaxle oil cooler (TOC) line from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection in Automatic Transmission - 4L80-E.

  10. Object Number: 520468  Size: SH
  11. Disconnect the wiring harness electrical connectors (1) from the fan motors.
  12. Using the J 38185 , reposition the hose clamp at the radiator outlet hose.
  13. Remove the radiator outlet hose from the radiator.
  14. Remove the 2 cooling fan mounting bolts.
  15. Remove the lower TOC line from the radiator.
  16. Tilt the cooling fans toward the engine to access the TOC line nut.


    Object Number: 130726  Size: SH
  17. Lift the fan assembly off the lower holding tabs.
  18. Remove the fan assembly from the vehicle.

Installation Procedure


    Object Number: 130726  Size: SH
  1. Install the fan assembly.
  2. Insert the fan assembly into the lower radiator holding tabs.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the lower TOC line to the radiator.
  5. Tilt the cooling fans toward the engine to access the TOC line.

    Tighten
    Tighten the fitting to 18 N·m (13 lb ft).

  6. Install the electric cooling fan mounting bolts.
  7. Tighten
    Tighten the bolts to 9 N·m (80 lb in).

  8. Install the radiator outlet hose to the radiator.
  9. Using the J 38185 , reposition the hose clamp at the radiator outlet hose.
  10. Raise the vehicle.

  11. Object Number: 420680  Size: SH
  12. Install the engine oil cooler bracket to the fan shroud.
  13. Install the engine oil cooler bracket bolt.
  14. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 520468  Size: SH
  15. Connect the wiring harness electrical connectors (1) to the fan motors.

  16. Object Number: 566627  Size: SH
  17. Install the upper TOC line to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection in Automatic Transmission - 4L80-E.
  18. Install the transaxle oil cooler pipe bracket to fan shroud bolt.
  19. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  20. Fill the cooling system. Refer to Cooling System Draining and Filling .
  21. Install the upper tie bar. Refer to Front End Upper Tie Bar Replacement in Body Front End.
  22. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.