Aurora 2001-2003

Electric Engine Fan

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Fan Switch



Removal & Installation

The radiator cooling fans are controlled by the PCM-there is no dedicated fan switch.

Removal & Installation



3.5L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect battery negative cable from battery and properly isolate to prevent accidental reconnection.
    NOTE
    Always turn the ignition OFF when connecting or disconnecting battery cables, battery chargers, or jumper cables. Failing to do so may damage the Powertrain Control Module (PCM) or other electronic components.


    NOTE
    The battery is located beneath the rear seat cushion.


    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.

  4.  
  5. Remove the upper tie bar.
  6.  
  7. Disconnect the wiring harness electrical connectors from the cooling fan motors.
  8.  
  9. Remove the clips attaching the wiring harness to the fan shroud.
  10.  
  11. Remove the lower air deflector.
  12.  
  13. Remove the transaxle oil cooler line retaining bolt and clip from the fan shroud.
  14.  
  15. Slide the plastic cap off the upper quick connect joint.
  16.  
  17. Disconnect the upper transaxle oil cooler line from the radiator using the J 41623-B or a suitable GM cooling line remover.
  18.  
  19. Remove the two fan shroud mounting bolts.
    NOTE
    Care should be taken when removing the cooling fan assembly not to damage the lower attachment points of both the cooling fan assembly and radiator.

  20.  
  21. Lift the cooling fan assembly off the lower mounting features of the radiator and remove from the vehicle.
    NOTE
    The bolt retaining the condenser to the radiator end tank is a special length and should be the ONLY bolt used upon reinstallation. The use of a longer bolt will damage the radiator end tank.

  22.  
  23. Remove or disconnect the following:

    Fan retaining nut from the motor
     
    Fan from the motor shaft
     
    Motor retaining screws
     
    Motor from the shroud

    Click image to see an enlarged view

    Fig. Overview of fan motors, blades and shroud

     

  24.  

To install:

  1. Install or connect the following:
    NOTE
    Care should be taken when installing the cooling fan assembly not to damage lower attachment points of both the cooling fan assembly and radiator.



    Motor to the shroud
     
    Motor retaining screws and tighten the screws to 53 inch lbs. (6 Nm)
     
    Fan to the motor shaft
     
    Fan retaining nut to the motor and tighten the nut to 53 inch lbs. (6 Nm)
     

  2.  
  3. Install the cooling fan assembly into position, aligning the lower feet of the shroud to the lower mounting features on the radiator.
  4.  
  5. Install the cooling fan mounting bolts and tighten to 53 inch lbs. (6 Nm)
  6.  
  7. Push the upper transaxle oil cooler line into the radiator quick connect fitting, until a "click" is heard.
    1. Tug gently on the cooler line to ensure proper retention.
    2.  

  8.  
  9. Slide the plastic cap over the quick connect joint.
  10.  
  11. Install the transaxle oil cooler line retaining clip and bolt to the fan shroud and tighten the bolt to 53 inch lbs. (6 Nm)
  12.  
  13. Install the lower air deflector.
  14.  
  15. Connect the wiring harness electrical connectors to the cooling fan motors.
  16.  
  17. Attach the wiring harness retaining clips to the fan shroud.
  18.  
  19. Install the upper tie bar and securely tighten the nuts and bolts.
  20.  
  21. Reconnect the negative battery cable and reinstall the rear seat cushion.
  22.  

4.0L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect battery negative cable from battery and properly isolate to prevent accidental reconnection.
    NOTE
    Always turn the ignition OFF when connecting or disconnecting battery cables, battery chargers, or jumper cables. Failing to do so may damage the Powertrain Control Module (PCM) or other electronic components.


    NOTE
    The battery is located beneath the rear seat cushion.


    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.

  4.  
  5. Remove the upper tie bar.
  6.  
  7. Drain the cooling system.
  8.  
  9. Remove the coolant hose clamp using special tool J 37097-A or a suitable hose clamp remover.
  10.  
  11. Remove the radiator hose from the radiator, and place aside over the engine.
  12.  
  13. Remove the upper transaxle oil cooler line retaining bolt and retainer from the fan shroud.
  14.  
  15. Slide the plastic cap off the quick connect joint.
  16.  
  17. Disconnect the upper transaxle oil cooler line from the radiator using the J 41623-B or a suitable GM cooling line disconnector.
  18.  
  19. Disconnect the wiring harness electrical connectors from the cooling fan motors.
  20.  
  21. Remove the clips attaching the harness to the fan shroud.
  22.  
  23. Disconnect the 2 retainers from the A/C discharge hose.
  24.  
  25. Remove the 2 fan shroud mounting bolts.
    NOTE
    Care should be taken when removing the cooling fan assembly not to damage the lower attachment points of both the cooling fan assembly and radiator.

  26.  
  27. Lift the cooling fan assembly off the lower mounting features of the radiator and position towards the right side of the vehicle in order to remove.
  28.  
  29. Remove or disconnect the following:

    Fan retaining nut from the motor
     
    Fan from the motor shaft
     
    Motor retaining screws
     
    Motor from the shroud

    Click image to see an enlarged view

    Fig. Overview of fan motors, blades and shroud

     

  30.  

To install:

  1. Install or connect the following:
    NOTE
    Care should be taken when installing the cooling fan assembly not to damage the lower attachment points of both the cooling fan assembly and radiator.



    Motor to the shroud
     
    Motor retaining screws and tighten to 53 inch lbs. (6 Nm)
     
    Fan to the motor shaft
     
    Fan retaining nut to the motor and tighten the nut to 53 inch lbs. (6 Nm)
     

  2.  
  3. Install the cooling fan assembly into position, aligning the lower feet of the shroud to the mounting features on the radiator.
    NOTE
    The bolt retaining the condenser to the radiator end tank is a special length and should be the ONLY bolt used upon reinstallation. The use of a longer bolt will damage the radiator end tank.

  4.  
  5. Install the cooling fan mounting bolts and tighten to 53 inch lbs. (6 Nm)
  6.  
  7. Connect the wiring harness electrical connectors to the cooling fan motors.
  8.  
  9. Attach the wiring harness retaining clips to the fan shroud.
  10.  
  11. Connect the 2 retainers to the A/C discharge hose.
  12.  
  13. Push the upper transaxle oil cooler line into the radiator quick connect fitting, until a "click" is heard.
    1. Tug gently on the cooler line to ensure proper retention.
    2.  
    3. Slide the plastic cap (1) over the quick connect joint.
    4.  

  14.  
  15. Install the upper transaxle oil cooler line retaining bolt to the fan shroud and tighten the bolt to 53 inch lbs. (6 Nm)
  16.  
  17. Connect the radiator hose to the radiator.
  18.  
  19. Install the upper tie bar and securely tighten the nuts and bolts.
  20.  
  21. Fill the cooling system.
  22.  
  23. Reconnect the negative battery cable and reinstall the rear seat cushion.
  24.  

 
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