Removal Procedure
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
- Lower the vehicle.
- Disconnect the electrical connector from the engine coolant temperature (ECT) sensor.
- Remove the ECT sensor.
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
Installation Procedure
- Coat the ECT sensor threads with sealer GM P/N 12346004 or the equivalent.
- Install the ECT sensor.
- Connect the ECT sensor electrical connector.
- Refill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
- Start the engine and check for leaks.
- Reinspect the engine coolant level. Refer to Cooling System Draining and Filling in Engine Cooling.
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten
Tighten the ECT sensor to 20 N·m (15 lb ft).
