GrandPrix, Impala 2006-2008, Monte Carlo 2006-2007

Crankshaft Position Sensor

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Removal & Installation



3.1L And 3.4L Engines
24x
  1. Raise and support the vehicle.
  2.  
  3. Remove the lower air deflector.
  4.  
  5. Remove the crankshaft balancer.
  6.  
  7. Disconnect the Crankshaft Position (CKP) sensor electrical connector.
    NOTE
    Note the routing of the sensor harness before removal.

  8.  
  9. Remove the harness retaining bolt (4) and the clip (3).
  10.  
  11. Remove the CKP sensor bolts (4).
  12.  
  13. Remove the CKP sensor (1).
  14.  
  15. To install, reverse removal procedure.

    Click image to see an enlarged view

    Fig. Removing and installing CKP sensor (24X) and components

  16.  

7x
  1. Turn the steering wheel fully to the left.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Remove the right front wheel.
  6.  
  7. Disconnect the Crankshaft Position (CKP) sensor electrical connector.
  8.  
  9. Remove the CKP sensor bolt.
  10.  
  11. Remove the CKP sensor.
  12.  
  13. Inspect for wear, cracks, or leakage if the sensor is not being replaced.
  14.  
  15. To install, reverse removal procedure.
  16.  

3.5L And 3.9L Engines
  1. Raise and support the vehicle.
  2.  
  3. Disconnect the Crankshaft Position (CKP) sensor electrical connector.
  4.  
  5. Remove the CKP sensor stud.
  6.  
  7. Remove the CKP sensor.
  8.  
  9. To install, reverse removal procedure.
  10.  
  11. Lubricate the CKP sensor O-ring with clean engine oil.

    Click image to see an enlarged view

    Fig. Removing and installing CKP sensor and components-3.5L and 3.9L engines

  12.  

3.8L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Remove the crankshaft harmonic balancer.
  6.  
  7. Disconnect the Crankshaft Position (CKP) sensor electrical connector.
  8.  
  9. Remove the CKP sensor shield. DO NOT use a pry bar.
  10.  
  11. Remove the CKP sensor studs.
  12.  
  13. Remove the CKP sensor.
  14.  
  15. To install, reverse removal procedure.
  16.  
  17. Tighten the studs to 22 ft. lbs. (30 Nm).
  18.  
  19. Perform the crankshaft position system variation learn procedure after reconnecting the negative battery cable.

    Click image to see an enlarged view

    Fig. Removing and installing CKP sensor and components-3.8L engine

  20.  

5.3L Engine

CAUTION
To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

  1. Remove the right exhaust manifold
  2.  
  3. Disconnect the Crankshaft Position (CKP) sensor electrical connector.
    CAUTION
    Clean the area around the CKP before removal in order to avoid debris from entering the engine.

  4.  
  5. Remove the CKP sensor bolt.
  6.  
  7. Remove the CKP sensor.
  8.  
  9. To install, reverse removal procedure.
  10.  
  11. Tighten the studs to 18 ft. lbs. (25 Nm).
  12.  
  13. Perform the crankshaft position system variation learn procedure after reconnecting the negative battery cable.

    Click image to see an enlarged view

    Fig. Removing and installing CKP sensor and components-5.3L engine

  14.  

Testing



Many intermittent open or shorted circuits come and go with harness and connector movement caused by vibration, engine torque, bumps and rough pavement, etc.

  1. Test the wiring harness and connectors by performing the following:

    Move the related connectors and wiring while monitoring the appropriate scan tool data.
     
    Move the related connectors and wiring with the component commanded ON and OFF, with the scan tool. Observe the components operation.
     
    With the engine running, move the related connectors and wiring while monitoring engine operation
     
    If harness or connector movement affects the data displayed, the component and system operation, or the engine operation, inspect and repair the harness or connections as necessary
     

  2.  
  3. Test the electrical connections and/or wiring by performing the following:

    Inspect for incorrect mating of the connector halves, or terminals not fully seated in the connector body, backed-out.
     
    Inspect for improperly formed or damaged terminals. Test for incorrect terminal tension.
     
    Inspect for poor terminal to wire connections including terminals crimped over insulation. This requires removing the terminal from the connector body.
     
    Inspect for corrosion or water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring. The conductor can corrode inside the insulation with little visible evidence. Look for swollen and stiff sections of wire in the suspect circuits.
     
    Inspect for wires that are broken inside the insulation.
     

  4.  

 
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