GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 256314  Size: SH

    Caution: To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

  1. Raise the vehicle.
  2. Remove the right front wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Disconnect and reposition the jumper harness connector.
  4. Disconnect the electrical connector from the knock sensor.
  5. Remove the knock sensor (1) from the engine block.

Installation Procedure

Important: When replacing the knock sensor, use the following recommended procedures:

   • A dropped or over-torqued sensor is considered bad and should be replaced.
   • Check all of the connectors for any damaged terminals.
   • Clean all of the mounting surfaces before re-installing any components.


    Object Number: 256314  Size: SH

    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 (1) into the engine block.
  2. Tighten
    Tighten the sensor to 15 N·m (133 lb in)

  3. Connect the electrical connector to the knock sensor.
  4. Install the jumper harness connector.
  5. Install the right front wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  6. Lower the vehicle.