GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Knock Sensor 1 Replacement

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

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

Installation Procedure

    Object Number: 678815 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the KS (2) into the engine block.

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

  2. Connect the KS harness connector (1) to the KS (2).