GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Optra - Mexico 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Knock Sensor Replacement

Removal Procedure

    Warning: Refer to Battery Disconnect Warning in the Preface section.


    Object Number: 1289475 Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the intake manifold support bracket bolts.
  3. Remove the intake manifold support bracket.

    4. Object Number: 1289476 Size: SH
  4. Disconnect the knock sensor (KS) electrical connector.
  5. Remove the KS bolt.
  6. Remove the KS.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1289476 Size: SH
  1. Install the KS with the bolt and tighten to 20 N·m (15 lb ft).
  2. Connect the KS electrical connector.

    3. Object Number: 1289475 Size: SH
  3. Install the intake manifold support bracket with the bolts and tighten.
    4. • the intake manifold support bracket upper bolts to 25 N·m (18 lb ft)
    • the intake manifold support bracket lower bolts to 45 N·m (33 lb ft)
  4. Connect the negative battery cable.