GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Impala 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Crankshaft Position Sensor Replacement

Removal Procedure

Tools Required

    • J 36660-A Torque/Angle Meter
    • J 37096 Flywhell Holding Tool
    • J 38197-A Balancer Remover
  1. Turn OFF the ignition.
  2. Remove the serpentine belt(s) from the crankshaft pulley. Refer to Drive Belt Replacement in Engine Mechanical.
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Remove the right front wheel and tire assembly.
  5. Remove the right inner fender access cover.
  6. Remove the crankshaft harmonic balancer. Refer to Crankshaft Balancer Replacement in Engine Mechanical.

    7. Object Number: 12302 Size: SH
  7. Remove the crankshaft position sensor shield (1) (Do Not use a pry bar).
  8. Disconnect the sensor electrical connector.
  9. Remove the attaching bolts from the crankshaft position sensor.

    10. Object Number: 12303 Size: SH
  10. Remove the crankshaft position sensor from block face.

Installation Procedure

    Object Number: 12303 Size: SH
  1. Position the crankshaft position (CKP) sensor to the block.

    2. 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.

  2. Install the bolts to hold the CKP sensor to the block face.

    3. Tighten
    Tighten the bolts to 20-40 N·m (14-28 lb ft).


    Object Number: 12302 Size: SH
  3. Reinstall the crankshaft position sensor shield (3).
  4. Connect the CKP sensor electrical connector.
  5. Reinstall the crankshaft harmonic balancer on the crankshaft. Refer to Crankshaft Balancer Replacement in Engine Mechanical.
  6. Install the right inner fender access cover.
  7. Install the right front wheel and tire assembly.

    8. Tighten
    Tighten the wheel nuts to 140 N·m (104 lb ft).

  8. Lower the vehicle.
  9. Install the serpentine belt(s). Refer to Drive Belt Replacement in Engine Mechanical.
  10. Perform the Crankshaft Position System Variation Learn .