GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1401956  Size: SH
  1. Remove the oil level indicator (418) from the tube.
  2. Remove the oil level indicator tube bolt (419).
  3. Remove the oil level indicator tube (420) from the engine block.
  4. Important: Inspect the O-ring for cuts or damage. The O-ring seal may be used again if it is not cut or damaged.

  5. Remove the O-ring (421) from the tube, as required.