GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Uplander Ext. 🢒 Engine 🢒 Engine Controls and Fuel - 3.9L 🢒 Knock Sensor Replacement - Bank 1

Removal Procedure

    Object Number: 1679872 Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the radiator air baffle. Refer to Radiator Air Baffle Assemblies and Deflectors .
  3. Disconnect the engine harness electrical connector (1) from the knock sensor.

    4. Object Number: 1587771 Size: SH
  4. Loosen and remove the bank 1 knock sensor (1).

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1587771 Size: SH

    Note:  DO NOT apply thread sealant to the sensor threads. The sensor threads are coated at the factory. Applying additional sealant affects the sensors ability to detect detonation.

  1. Install and tighten the bank 1 knock sensor (1) to 25 N·m (18 lb ft) .

    2. Object Number: 1679872 Size: SH
  2. Connect the engine harness electrical connector (1) to the knock sensor.
  3. Install the radiator air baffle. Refer to Radiator Air Baffle Assemblies and Deflectors .
  4. Lower the vehicle.