GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the wiring harness connector (1) from the knock sensor (2).

  3. Object Number: 678815  Size: SH
  4. Remove the knock sensor (2) from the engine block.

Installation Procedure

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.


    Object Number: 678815  Size: SH
  1. Install the knock sensor (2) into the engine block.
  2. Tighten
    Tighten the knock sensor to 19 N·m (14 lb ft).

  3. Connect the knock sensor harness connector (1) to the knock sensor (2).