GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Express 🢒 Engine 🢒 Engine Controls - 5.0L and 5.7L 🢒 Knock Sensor Replacement

Removal Procedure
  1. Turn OFF the ignition.
  2. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.

    3. 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.

  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    4. Object Number: 442292 Size: SH
  4. Remove the knock sensor harness connector.

    5. Object Number: 20272 Size: SH
  5. Remove the knock sensor (2).

Installation Procedure

    Object Number: 20272 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).

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


    Object Number: 442292 Size: SH
  2. Install the knock sensor harness connector.
  3. Lower the vehicle.
  4. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.