GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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

  1. Relieve the coolant system pressure.
  2. Turn OFF the ignition.

  3. Object Number: 204032  Size: SH
  4. Remove the ECT sensor electrical connector.

  5. Object Number: 204027  Size: SH
  6. Remove the ECT sensor.

Installation Procedure

  1. Apply sealer only to the threads.

  2. Object Number: 204027  Size: SH

    Notice: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

  3. Install the ECT sensor.
  4. Tighten
    Tighten the sensor to 25 N·m (18.5 lb ft).


    Object Number: 204032  Size: SH
  5. Install the electrical connector.
  6. Refill the lost coolant.