Caution: Hot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.

1. Remove the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.
2. Raise vehicle.
3. Remove the splash shield, drain cooling system. Refer to Cooling and Radiator.
4. Remove the knock sensor heat shield mounting bolt located under freeze plug (or block heater if equipped).
5. Remove the knock sensor wiring harness connector from knock sensor.
6. Remove the knock sensor from the engine block.

Important:  Do Not apply thread sealant to sensor threads. The sensor is coated at factory and applying additional sealant will affect the sensors ability to detect detonation.

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.

1. Install the knock sensor into engine block.

Tighten
Tighten the knock sensor to 19 N·m (14 lb ft).

2. Install the knock sensor heat shield mounting bolt located under the freeze plug (or block heater if equipped).
3. Install the knock sensor wiring harness connector to the knock sensor.
4. Install the splash shield.
5. Lower the vehicle.
6. Fill the cooling system. Refer to Cooling and Radiator.
7. Connect the negative battery cable.