GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: Perform the Crankshaft Position System Variation Learn when the Crankshaft Position sensor is removed or replaced.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.


    Object Number: 211621  Size: SH
  1. Disconnect the negative battery cable. Refer to

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

    in Cautions and Notices.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the starter. Refer to Starter Motor Replacement in Engine Electrical.

  4. Object Number: 56592  Size: SH
  5. Disconnect the Crankshaft Position (CKP) sensor electrical connector.

  6. Object Number: 55322  Size: SH
  7. Clean the area around the CKP before removal in order to avoid debris from entering the engine.
  8. Remove the CKP sensor retaining fastener.
  9. Remove the CKP sensor.

Installation Procedure

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 CKP sensor.

  2. Object Number: 55322  Size: SH
  3. Install the CKP sensor retaining fastener.
  4. Tighten
    Tighten the CKP sensor retaining fastener to 25 N·m (18 lb ft).


    Object Number: 56592  Size: SH
  5. Connect the CKP sensor electrical connector.

  6. Object Number: 211621  Size: SH
  7. Install the starter. Refer to Starter Motor Replacement in Engine Electrical.
  8. Lower the vehicle.
  9. Connect the negative battery cable.