GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN-328-B Pin Remover
    • EN-6624 Remover

For equivalent regional tools, refer to Special Tools.


    Object Number: 2027003  Size: SH

    Caution: Do not allow the crankshaft encoder wheel to come into contact with external magnetic fields or sharp metal objects. Do not drop the crankshaft encoder wheel. Do not damage the rubberized encoder track. Failure to follow these precautions may cause damage to the component.

  1. Remove the crankshaft position sensor bolt (1).
  2. Remove the crankshaft position sensor (2) from the crankshaft rear oil seal housing.
  3. Remove the crankshaft rear oil seal housing (3).

  4. Object Number: 2027001  Size: SH

    Note: 

       • Only make a hole at the 5 o'clock and 7 o'clock positions (1), these are the only positions where is a cavity behind the seal ring.
       • The diameter of the hole must not exceed 2 mm (0.0787 in). If the diameter of the hole exceeds 2 mm (0.0787 in), the bolt of EN-6624 remover will not be able to grip.


    Object Number: 2027002  Size: SH
  5. Using a suitable tool, such as a scribe (1), make a hole in the crankshaft rear oil seal.
  6. Position the scribe (1) at the outer edge of the crankshaft rear oil seal.

  7. Remove the seal ring.

  8. Object Number: 2027005  Size: SH
    5.1. Install EN-6624 remover  (1) to the crankshaft rear oil seal and tighten the bolt.

    Object Number: 2027006  Size: SH
    5.2. Install the EN-328-B remover  (2) to EN-6624 remover  (1).
    5.3. Using the EN-328-B remover  (2) and EN-6624 remover  (1) to remove the crankshaft rear oil seal.