Installation Procedure

Fig 1: Identifying Engine Coolant Temperature (ECT) Sensor

Courtesy of GENERAL MOTORS CORP.

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

If the sensor is being reused, apply thread sealant GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to sensor threads.

CAUTION: Refer to Component Fastener Tightening Caution .

Install the ECT sensor.
Tighten: Tighten the sensor to 23 N.m (17 lb ft).
Connect the ECT sensor harness connector. Push in the connector until a click is heard, then pull back to confirm a positive engagement.
Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
Fill the engine cooling system to proper level. Refer to Cooling System Draining and Filling (LNJ GE 47716 Fill) or Cooling System Draining and Filling (LNJ Static Fill) .