GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 CTS - RHD 🢒 Engine 🢒 Engine Controls - 2.6L and 3.2L 🢒 Knock Sensor 2 Replacement

Removal Procedure

    Object Number: 785856 Size: SH
  1. Disconnect the knock sensor pigtail (1) from the electrical connector (2) and bracket.
  2. Remove the accessory mounting bracket. Refer to Accessory Mounting Brackets Replacement in Engine Mechanical-2.6L and 3.2L.

    3. Important: Observe the routing of the pigtail for proper installation.

  3. Remove the knock sensor pigtail from the retaining clips.

    4. Object Number: 21524 Size: SH
  4. Remove the bolt from the center of the knock sensor (2).
  5. Remove the knock sensor (2) from the engine block.

Installation Procedure
  1. Thoroughly clean the mating surfaces of the knock sensor and the engine block. The entire contact surface of the knock sensor must lie directly on the engine block.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 21524 Size: SH

    Important: DO NOT use washers, spring washers, or toothed washers when installing the knock sensor. Tighten the bolt to the proper torque.

  2. Install the knock sensor (2) on to the engine block.

    3. Tighten
    Tighten the knock sensor bolt to 20 N·m (15 lb ft).

    Important: Install the knock sensor pigtail as noted during removal.

  3. Install the knock sensor pigtail into the retaining clips. Ensure that the pigtail does not contact any moving parts.
  4. Install the accessory mounting bracket. Refer to Accessory Mounting Brackets Replacement in Engine Mechanical-2.6L and 3.2L.

    5. Object Number: 785856 Size: SH
  5. Connect the knock sensor pigtail (1) to the electrical connector (2) and bracket.