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Home >> GMC >> 2001 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L - Repair Instructions >> Repair Instructions >> Crankshaft Position Sensor Replacement >> Removal Procedure
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Removal Procedure

NOTE:

In order to prevent damage to the crankshaft position (CKP) sensor reluctor wheel/ring, care must be used when removing or installing this component.

    Fig 1: View Of Rear Of Engine Fuel Pipe Connections
    GM300360Courtesy of GENERAL MOTORS COMPANY
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the fuel line bracket nut (5).
  3. Remove the fuel line bracket from the bellhousing stud.
  4. Lower the vehicle.
  5. Fig 2: View Of Crankshaft Position Sensor Harness Connector
    GM674728Courtesy of GENERAL MOTORS COMPANY
  6. Remove the driver side rear ignition coil bolts.
  7. Reposition the coil.
  8. Disconnect the crankshaft position (CKP) sensor electrical connector.
  9. Use penetrating oil and allow the oil to soak around the CKP sensor prior to removing the sensor.
  10. Fig 3: View Of Crankshaft Position Sensor
    GM470801Courtesy of GENERAL MOTORS COMPANY
  11. Remove the CKP sensor bolt.
  12. Prior to removal of the CKP sensor, twist the sensor back and forth.
  13. Remove the CKP sensor.
  14. Fig 4: Checking CKP Sensor Wear
    GM814961Courtesy of GENERAL MOTORS COMPANY
    IMPORTANT:

    The CKP sensor is designed to contact the reluctor wheel of the crankshaft. Wear may be noticeable on the end of the sensor.

  15. Inspect the CKP sensor for wear.
  16. Normal CKP sensor wear will be shown on the wear strips (1), and no wear will be shown on the sensor sensing element (2).
  17. Fig 5: Excessive Or Abnormal CKP Sensor Wear
    GM814962Courtesy of GENERAL MOTORS COMPANY
  18. Excessive or abnormal sensor wear will be shown on the sensing element (2).
  19. If excessive/abnormal wear is present, replace the sensor.