GM Service Manual Online
For 1990-2009 cars only

    Object Number: 412447  Size: SH
  1. Remove the engine block coolant drain plug.
  2. Remove the rear oil passage plug.
  3. Remove the 6 oil passage plugs on the sides of the block.
  4. Remove the 2 water passage plugs on the top of the block.
  5. Remove the 2 front oil passage plugs.

  6. Object Number: 1977766  Size: SH
  7. Remove the knock sensor and bolt.

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

  10. Object Number: 630345  Size: SH
  11. Remove the crankshaft position (CKP) sensor and bolt.

  12. Object Number: 1594334  Size: SH
  13. If equipped, loosen the piston oil nozzle assembly bolt and remove the piston oil nozzle assembly.