GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Allow sufficient time for the engine to cool before removing the ECT sensor. A hot engine may cause an excessive coolant loss or a personal injury.

  1. Turn the ignition OFF.

  2. Object Number: 1949787  Size: SH
  3. Remove the engine coolant temperature sensor harness connector (1) from the coolant temperature sensor (2).

  4. Object Number: 1949790  Size: SH
  5. Remove the engine coolant temperature sensor (1) from the engine (2).

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1949790  Size: SH
  1. Install the coolant temperature sensor (1) to the engine.
  2. Tighten
    Tighten the coolant temperature sensor to 22 N·m (16 lb ft).


    Object Number: 1949787  Size: SH
  3. Install the coolant temperature sensor electrical connector (1) to the coolant temperature sensor.
  4. Inspect and fill the cooling system as necessary. Refer to Cooling System Draining and Filling.