GM Service Manual Online
For 1990-2009 cars only

Knock Sensor Replacement left Side

Removal Procedure

    Caution: The engine coolant may be hot. The knock sensor is mounted in the engine block cooling passage. The engine coolant in the block will drain with the removal of the knock sensor.

  1. Drain the engine coolant. Refer to Engine Cooling (6B).
  2. Raise the vehicle.

  3. Object Number: 13521  Size: SH
  4. Disconnect the knock sensor wiring harness connector from the knock sensor (6).
  5. Remove the knock sensor (6) from the engine block.

Installation Procedure


    Object Number: 13521  Size: SH
  1. Install the knock sensor (6) into the engine block. Be sure the threads are clean. Do not apply thread sealant to the sensor threads.
  2. Tighten
    Torque the KS to 19 N·m (14 lb ft).

  3. Connect the KS wiring harness connector to the knock sensor.
  4. Lower the vehicle.
  5. Refill the Engine coolant. Refer to Engine Cooling (6B).

Knock Sensor Replacement Right Side

Removal Procedure

    Caution: The engine coolant may be hot. The knock sensor is mounted in the engine block cooling passage. The engine coolant in the block will drain with the removal of the knock sensor.

  1. Drain the engine coolant. Refer to Engine Cooling (6B).
  2. Raise the vehicle.

  3. Object Number: 13564  Size: SH
  4. Disconnect the knock sensor wiring harness connector from the knock sensor (6).
  5. Remove the knock sensor (6) from the engine block.

Installation Procedure


    Object Number: 13564  Size: SH
  1. Install the knock sensor (6) into the engine block. Be sure the threads are clean. Do not apply thread sealant to the sensor threads.
  2. Tighten
    Torque the KS to 19 N·m (14 lb. ft.).

  3. Connect the KS wiring harness connector to the knock sensor.
  4. Lower the vehicle.
  5. Refill the Engine coolant. Refer to Engine Cooling (6B).