GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Century 🢒 Engine 🢒 Engine Controls - 3.1L 🢒 Knock Sensor Replacement

Removal Procedure

    Object Number: 12755 Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Disconnect the knock sensor electrical connector.
  3. Remove the knock sensor from the engine block.

Installation Procedure

    Object Number: 15945 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.

    Important:  DO NOT apply thread sealant to the sensor threads. The sensor threads are coated at the factory and applying additional sealant affects the sensors ability to detect detonation.

  1. Install the knock sensor.

    2. Tighten
    Tighten the sensor to 19 N·m (14 lb ft).

  2. Connect the knock sensor electrical connector.
  3. Lower the vehicle.