GM Service Manual Online
For 1990-2009 cars only

Notice: The Camshaft Position Sensor graphic illustrates the original factory installation. Do not route the new sensor pigtail as shown. Follow the Installation procedure below. Handle carefully in order to avoid damage to the sensor and pigtail. Route away from electronic components in order to avoid Electromagnetic Interference (EMI).

Removal Procedure


    Object Number: 12754  Size: SH
  1. Disconnect the negative battery cable.
  2. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

  3. Remove the serpentine drive belt. Refer to Drive Belt Tensioner Replacement in Engine Mechanical.
  4. Remove the power steering pump assembly. Refer to Power Steering Pump Replacement in Power Steering Systems.
  5. Remove the cam sensor electrical connector.
  6. Remove the attaching bolt.
  7. Remove the sensor.
  8. Inspect the sensor for wear, cracks or leakage if the sensor is not being replaced.

Installation Procedure

  1. Lubricate the O-ring with clean engine oil and replace if damaged.

  2. Object Number: 12754  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.

  3. Install the Camshaft Position Sensor.
  4. Tighten
    Tighten the retaining bolt to 10 N·m (8 lb ft).

  5. Connect the cam sensor electrical connector.
  6. Reinstall the power steering pump. Refer to Power Steering Pump Replacement in power steering systems.
  7. Install the serpentine drive belt. Refer to Drive Belt Tensioner Replacement .
  8. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.