GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Express 🢒 Engine 🢒 Engine Controls and Fuel - 4.3L 🢒 Knock Sensor 2 Replacement

Removal Procedure

    Object Number: 1877018 Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Reposition the knock sensor sleeve (2) down, away from the knock sensor.
  3. Disconnect the engine wiring harness electrical connector from the knock sensor (1).

    4. Object Number: 1877020 Size: SH
  4. Remove the knock sensor bolt and sensor.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1877020 Size: SH
  1. Position the knock sensor to the engine block and install the bolt and tighten to 25 N·m (18 lb ft).

    2. Object Number: 1950126 Size: SH
  2. Connect the engine wiring harness electrical connector to the knock sensor (1).
  3. Position the knock sensor sleeve (2) up and over the knock sensor.
  4. Lower the vehicle.