GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1822240  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. If equipped with front wheel drive (FWD), disconnect the engine wiring harness electrical connector (1) from the knock sensor.

  3. Object Number: 1822241  Size: SH
  4. If equipped with all wheel drive (AWD), disconnect the engine wiring harness electrical connector (1) from the knock sensor.

  5. Object Number: 1822243  Size: SH
  6. Loosen the knock sensor bolt and remove the knock sensor.

Installation Procedure

Note: DO NOT apply threadlocker to the sensor threads. The sensor threads are coated at the factory and applying additional threadlocker affects the sensor's ability to detect detonation.

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1822243  Size: SH
  1. Position the knock sensor to the engine and tighten the bolt.
  2. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 1822241  Size: SH
  3. If equipped with AWD, Connect the engine wiring harness electrical connector (1) to the knock sensor.

  4. Object Number: 1822240  Size: SH
  5. If equipped with FWD, Connect the engine wiring harness electrical connector (1) to the knock sensor.
  6. Lower the vehicle.