GM Service Manual Online
For 1990-2009 cars only
  1. Remove the oil level indicator from the oil level indicator tube.

  2. Object Number: 276410  Size: SH
  3. Remove the oil level indicator tube retaining clip.

  4. Object Number: 276406  Size: SH
  5. Remove the oil indicator tube bracket nut from the right exhaust manifold stud.
  6. Remove the oil level indicator tube.
  7. Remove the oil level indicator O-ring seal (if required).