GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 41712 Oil Pressure Switch Socket

For equivalent regional tools, refer to Special Tools.

    Warning: Refer to Safety Glasses Warning in the Preface section.


    Object Number: 1877015  Size: SH
  1. Remove the knock sensor bolt and knock sensor from the left side of the lower engine block.

  2. Object Number: 1877020  Size: SH
  3. Remove the knock sensor bolt and knock sensor from the right side of the lower engine block.

  4. Object Number: 1970823  Size: SH
  5. Remove the block heater from the right side of the lower engine block.

  6. Object Number: 188018  Size: SH
  7. Remove the engine oil pressure gage sensor using the J 41712 socket .

  8. Object Number: 188020  Size: SH
  9. Remove the engine oil pressure sensor fitting.

  10. Object Number: 334350  Size: SH
  11. Remove the transmission locator dowel straight pins, if required.

  12. Object Number: 5271  Size: SH
  13. Remove the engine block left side oil gallery plug.
  14. Remove the engine block left rear oil gallery plug.
  15. Remove the engine block right rear oil gallery plug.

  16. Object Number: 334364  Size: SH
  17. Remove the expansion cup plug from the camshaft rear bearing hole and discard.

  18. Object Number: 334366  Size: SH
  19. Remove the expansion cup plug from the balance shaft rear bearing hole and discard.

  20. Object Number: 334323  Size: SH
  21. Remove the crankshaft rear oil seal housing locator spring type S pin, if required.

  22. Object Number: 5270  Size: SH
  23. Remove the front oil gallery plugs or balls from the front of the engine block and discard.
  24. Insert a 3/8 x 26 inch rod into the rear oil gallery holes in order to drive out the front oil gallery plugs or balls.


    Object Number: 480550  Size: SH
  25. Remove the engine block core hole plugs.
  26. 14.1. Use a suitable tool in order to drive the engine block core hole plugs into the coolant jacket.
    14.2. Use a suitable tool in order to pull the engine block core hole plugs from the coolant jacket.
    14.3. Discard the engine block core hole plugs.

    Object Number: 188026  Size: SH
  27. Remove the oil filter bypass valve and discard.