GM Service Manual Online
For 1990-2009 cars only
  1. Remove the oil level indicator.
  2. Drain the engine oil.

  3. Object Number: 464723  Size: SH
  4. Remove the following fasteners from the lower cylinder block:
  5. • The 16 bolts
    • The 2 nuts

    Object Number: 464771  Size: SH

    Notice: Do not damage the oil pan contact surface of the lower cylinder block when removing the oil pan.

  6. Carefully remove the engine oil pan.
  7. Remove the 3 bolts and the oil pump strainer.
  8. Clean the following components:
  9. • The inside of the engine oil pan.
    • The oil pump strainer screen.
    • The mating surfaces of the engine oil pan and the lower cylinder block.