GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1622787  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Disconnect the knock sensor (KS) electrical connector (6).

  3. Object Number: 1578476  Size: SH
  4. Remove the KS bolt.
  5. Remove the KS.

Installation Procedure

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

    Caution: Refer to Fastener Caution in the Preface section.


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


    Object Number: 1622787  Size: SH
  4. Connect the KS electrical connector (6).
  5. Lower the vehicle.