GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2004 🢒 L300/LW300 🢒 Engine 🢒 Engine Cooling 🢒 Engine Coolant Temperature Sensor Replacement

Removal Procedure
  1. Loosen the radiator drain plug and drain the coolant 1 liter below the level of the coolant in the coolant surge tank, using a drain pan.
  2. Tighten the drain plug.

    3. Object Number: 894672 Size: SH
  3. Disconnect the engine coolant temperature (ECT) sensor harness connector.
  4. Remove the ECT sensor.

Installation Procedure
  1. Apply RTV sealant, or equivalent, to the sensor threads.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the ECT sensor.

    3. Tighten
    Tighten the engine coolant temperature sensor to 18 N·m (13 lb ft).


    Object Number: 894672 Size: SH
  3. Connect the ECT sensor harness connector. Push the connector in until the lock position is felt, then pull back to confirm engagement.
  4. Refill the cooling system to the proper level. Refer to Cooling System Draining and Filling in Engine Cooling.