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Home >> GMC >> 2012 >> Yukon Hybrid, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls/Fuel - Hybrid (LZ1) - Repair Instructions >> Repair Instructions >> Engine Coolant Temperature Sensor Replacement >> Installation Procedure

Installation Procedure

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.

CAUTION:

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

    Fig 1: View Of ECT Sensor
    GM855737Courtesy of GENERAL MOTORS COMPANY
  1. If installing the old sensor, coat the threads with sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent.
    2. CAUTION:

    Refer to Fastener Caution .

  2. Install the ECT sensor.

    Tighten 

    Tighten the sensor to 20 N.m (15 lb ft).

    3. Fig 2: Locating Engine Wiring Harness Electrical Connector, Clip, Bolt & ECT Sensor
    GM1960215Courtesy of GENERAL MOTORS COMPANY
  3. Connect the engine wiring harness electrical connector (2) to the ECT sensor (1).
  4. Refill the cooling. Refer to Cooling System Draining and Filling (Static Fill) .
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