Installation Procedure

Fig 1: Identifying ECT Sensor

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Tap out the sensor mounting hole in the engine head to remove any thread sealant residue. Clean any sealant residue from the old sensor and apply the RTV sealant to threads if old the sensor is going to be reused.

NOTE: Refer to Fastener Notice .

Apply the thread sealant GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the sensor threads.
Install the ECT sensor.
Tighten: Tighten the sensor to 20 N.m (15 lb ft).

Fig 2: Locating ECT Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Connect the ECT sensor electrical connector (1).
Fill the cooling system as needed. Refer to Draining and Filling Cooling System .