GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 41712 Oil Pressure Switch Socket


    Object Number: 823316  Size: SH

    Important: Do not remove the engine block front oil gallery plug unless service is required.

    If the front oil gallery plug is removed for service, a NEW oil gallery plug must be installed.

  1. Remove the oil pressure sensor, if not previously removed, using the J 41712 or equivalent.

  2. Object Number: 63164  Size: SH
  3. Remove the engine block right rear coolant plug.

  4. Object Number: 825835  Size: SH
  5. Remove the engine block coolant heater, if applicable.

  6. Object Number: 825834  Size: SH
  7. Remove the engine block left rear coolant plug, if applicable.

  8. Object Number: 260139  Size: SH
  9. Remove the engine block left front oil gallery plug.

  10. Object Number: 64923  Size: SH
  11. Remove the engine block left rear oil gallery plug.
  12. Inspect the block plug sealing washers.
  13. If the block plug and heater sealing washers are not damaged, they may be used during assembly.


    Object Number: 63228  Size: MH
  14. Remove the engine block rear oil gallery plug.
  15. Inspect the O-ring seal of the rear oil gallery plug.
  16. If the O-ring seal is not cut or damaged, the plug and O-ring seal may be used during assembly.


    Object Number: 64295  Size: SH

    Important: Remove the front oil gallery plug only if service is required.

    If the front oil gallery plug is removed, a NEW oil gallery plug must be installed.

  17. Remove the engine block front oil gallery plug.