GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1890235  Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Disconnect the engine wiring harness electrical connector (1) from the knock sensor pigtail electrical connector (6).
  4. Remove the knock sensor electrical connector pigtail (6) clip from the oil level indicator tube bracket.

  5. Object Number: 1578476  Size: SH
  6. Remove the knock sensor bolt.
  7. Remove the knock sensor.

Installation Procedure

Important: Rotate the pigtail 90 degrees from vertical before securing the fastener.

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1578476  Size: SH
  1. Install the knock sensor.
  2. Install the knock sensor bolt.
  3. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 1890235  Size: SH
  4. Install the knock sensor electrical connector pigtail (6) clip to the oil level indicator tube bracket.
  5. Connect the engine wiring harness electrical connector (1) to the knock sensor pigtail electrical connector (6).
  6. Lower the vehicle.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .