GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

The knock sensor (KS) is located at the top rear of the engine.

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.

  3. Object Number: 679284  Size: SH
  4. Disconnect the KS harness connector (3).
  5. Remove the KS bolt (1).
  6. Remove the KS (2).

Installation Procedure


    Object Number: 679284  Size: SH

    Notice: 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.

  1. Install the knock sensor (2) and bolt (1).
  2. Tighten
    Tighten the knock sensor bolt to 25 N·m (18 lb ft).

  3. Connect the KS harness connector (3).
  4. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.