GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Intrigue 🢒 Engine 🢒 Engine Controls - 3.5L 🢒 Crankshaft Position Sensor Replacement

Removal Procedure

    Object Number: 350545 Size: SH
  1. Disconnect the negative battery cable.
  2. Raise the vehicle.
  3. Remove/loosen the Starter Motor (1). Refer to Starter Motor Replacement in Engine Electrical.
  4. Disconnect the electrical connector from the CKP sensor (2).

    Object Number: 350551 Size: SH
  1. Remove the CKP sensor mounting bolt (1).
  2. Remove the CKP sensor (2) from the engine block.
    3.    - Remove the sensor by pulling on the sensor connector. Do not pry on the bracket.
       - Do not rotate (twist) the sensor or damage the mounting bracket (if the sensor is being reused).

Installation Procedure

Important: When replacing the CKP sensor (new or reinstallation of the original sensor), use the following recommended procedures:

   • Make sure that the CKP sensor bore is completely free of any foreign material (old O-ring, dirt, burrs, etc.).
   • Make sure that the flange on the CKP sensor bore is not damaged.
   • Clean all mounting surfaces before re-installing components.
   • Inspect the CKP sensor and replace if any of the following conditions are present:
      - The bracket is damaged.
      - The face of the sensor (bottom of brass housing) exhibits any damage.
      - Never install a sensor that has been dropped.
   • Lubricate the O-ring on the sensor prior to installing the sensor (use Amojell or clean engine oil).
   • Check all connectors for damaged terminals.


    Object Number: 350551 Size: SH
  1. Lubricate the CKP sensor O-rings.
  2. Install and fully seat the CKP sensor (2) into the engine block.

    3. 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.

  3. Install the CKP sensor mounting bolt (1).

    4. Tighten
    Tighten the mounting bolt to 9N·m (80 Lb. in.)

  4. Ensure that the CKP sensor mounting flange is contacting the engine block.

    Object Number: 350545 Size: SH
  1. Connect the CKP sensor electrical connector to the CKP sensor (2).
  2. Re-install/tighten the Starter Motor (1). Refer to Starter Motor Replacement in Engine Electrical.
  3. Reconnect the negative battery cable.
  4. Lower the vehicle.
  5. The Crankshaft Position System Variation Learn must be performed after replacing the CKP sensor. Even if the original sensor is reinstalled, the Learn Procedure must be performed.