GM Service Manual Online
For 1990-2009 cars only

    Object Number: 412447  Size: SH
  1. Remove the water jacket drain plug.
  2. Remove the oil flow check valve.
  3. Remove the rear oil passage plug.
  4. Remove the six oil passage plugs on the sides of the block.
  5. Remove the two water passage plugs on the top of the block.
  6. Remove the two front oil passage plugs.

  7. Object Number: 630342  Size: SH
  8. Remove the knock sensor and bolt.

  9. Object Number: 630350  Size: SH
  10. Remove the oil pressure switch.

  11. Object Number: 630345  Size: SH
  12. Remove the crankshaft position sensor and bolt.