GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2009 🢒 H3 🢒 Engine 🢒 Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Knock Sensor 1 Replacement

Removal Procedure

    Object Number: 1899640 Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Disconnect the engine wiring harness electrical connector (2) from the knock sensor (1).

    3. Object Number: 1402136 Size: SH
  3. Remove the knock sensor bolt (739) and sensor (718).

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1402136 Size: SH
  1. Position the knock sensor (718) to the engine block and install the bolt (739).

    2. Tighten
    Tighten the bolt to 20 N·m (15 lb ft).


    Object Number: 1899640 Size: SH
  2. Connect the engine wiring harness electrical connector (2) to the knock sensor (1).
  3. Lower the vehicle.