GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 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

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1877020 Size: SH
  1. Position the knock sensor to the engine block and install the bolt.

    2. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    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.