Installation Procedure

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

NOTE: 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.

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

NOTE: Refer to Fastener Notice in Cautions and Notices.

Fig 1: Locating ECT Sensor

Courtesy of GENERAL MOTORS CORP.

Install the ECT sensor.
Tighten: Tighten the ECT sensor to 16 N.m (12 lb ft).

Fig 2: Locating ECT Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Connect the ECT electrical connector (1).
Install the generator and the drive belt. Refer to Generator Replacement (4.2L Engine) or Generator Replacement (5.3L Engine) in Engine Electrical.
Connect the negative battery terminal.
Refill the engine coolant. Refer to Draining and Filling Cooling System (LL8) or Draining and Filling Cooling System (LM4) in Engine Cooling.