GM Service Manual Online
For 1990-2009 cars only
  1. Disconnect the oil level sensor connector.

  2. Object Number: 159445  Size: SH
  3. Remove the oil level sensor wire electrical connector C-clip (1) from the upper oil pan.
  4. Remove the lower oil pan bolts.

  5. Object Number: 159221  Size: SH
  6. Remove the lower oil pan from the upper oil pan.
  7. Pull the oil level sensor electrical connector from the upper oil pan.