GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Knock Sensor 1 Replacement

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the wiring harness connector (1) from the knock sensor (2).

    3. Object Number: 678815 Size: SH
  3. Remove the knock sensor (2) from the engine block.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 678815 Size: SH
  1. Install the knock sensor (2) into the engine block.

    2. Tighten
    Tighten the knock sensor to 19 N·m (14 lb ft).

  2. Connect the knock sensor harness connector (1) to the knock sensor (2).