GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 LaCrosse 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Engine Block Plug Removal

    Object Number: 1552549 Size: SH
  1. Remove the engine block coolant heater (114).

    2. Object Number: 63164 Size: SH
  2. Remove the engine block coolant drain hole plug.

    3. Object Number: 1602758 Size: SH
  3. Remove the engine block left front oil gallery plug.

    4. Object Number: 64923 Size: SH
  4. Remove the engine block left rear oil gallery plug.
  5. Inspect the block plug sealing washers.

    6. If the block plug and heater sealing washers are not damaged, they may be used during assembly.


    Object Number: 63228 Size: MH
  6. Remove the engine block rear oil gallery plug.
  7. Inspect the O-ring seal of the rear oil gallery plug.

    8. 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.

  8. Remove the engine block front oil gallery plug.

    9. Object Number: 1402136 Size: SH
  9. Remove the left side knock sensor (718) and bolt (739).

    10. Object Number: 1665443 Size: SH
  10. Remove the right side knock sensor (718) and bolt (739).