GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1581861  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the knock sensor electrical connector (2).

  3. Object Number: 1587771  Size: SH
  4. Loosen and remove the knock sensor (2).

Installation Procedure

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

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1587771  Size: SH
  1. Install and tighten the knock sensor (2).
  2. Tighten
    Tighten the sensor to 25 N·m (18 lb ft).


    Object Number: 1581861  Size: SH
  3. Connect the knock sensor electrical connector (2).
  4. Lower the vehicle.