GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1642656  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Position the catalytic converter out of the way. Refer to Exhaust Seal Replacement .
  3. Disconnect the coolant heater cord from the coolant heater, if equipped.
  4. Disconnect the engine harness electrical connector (2) from the crankshaft position (CKP) sensor.

  5. Object Number: 1646073  Size: SH
  6. Remove the CKP sensor stud.
  7. Remove the CKP sensor.
  8. Inspect the CKP sensor O-ring for wear or damage if the sensor is not being replaced, replace the seal as necessary.

Installation Procedure


    Object Number: 1646073  Size: SH
  1. Lubricate the sensor O-ring with clean engine oil before installation and/or replace the O-ring, if necessary.
  2. Install the CKP sensor.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the CKP sensor stud.
  5. Tighten
    Tighten the stud to 10 N·m (89 lb in).


    Object Number: 1642656  Size: SH
  6. Connect the engine harness electrical connector (2) to the CKP sensor.
  7. Connect the coolant heater cord to the coolant heater, if equipped.
  8. Position the catalytic converter. Refer to Exhaust Seal Replacement .
  9. Lower the vehicle.
  10. Perform the CKP system variation learn procedure. Refer to Crankshaft Position System Variation Learn .