Installation Procedure

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

CAUTION: 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.

Fig 1: View Of ECT Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

If installing the original sensor or a new sensor without sealant, apply thread sealer GM P/N 12346004 (Canadian P/N 10953480) or equivalent.

CAUTION: Refer to Component Fastener Tightening Caution .

Using the J 45861 (4) carefully install the ECT sensor (3) into the cylinder head (5). See Special Tools .
Tighten: Tighten the sensor to 14 N.m (10 lb ft).
Connect the ECT sensor electrical connector (2) to the following:
- The engine wiring harness
- The camshaft cover (1)
Fill the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .