Aurora 2001-2003

Removal & Installation

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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.


    WARNING
    Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

  4.  
  5. Turn OFF the ignition.
  6.  
  7. Drain the coolant to below the level of the Engine Coolant Temperature (ECT) sensor.
  8.  
  9. Disconnect the ECT sensor.
  10.  
  11. Remove the ECT sensor.

    Click image to see an enlarged view

    Fig. ECT sensor location-3.5L engine

  12.  

To install:

  1. Coat the sensor threads with an electrically conductive sealer GM P/N 1050805 or equivalent.
  2.  
  3. Install the ECT sensor and tighten to 15 ft. lbs. (20 Nm)
  4.  
  5. Connect the connector to the ECT sensor.
  6.  
  7. Refill the coolant system.
  8.  
  9. Reconnect the negative battery cable and reinstall the rear seat cushion.
  10.  

 
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