GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Engine Block Plug Removal

    Object Number: 180956 Size: SH
  1. Remove the camshaft rear bearing hole plug:
    2. 1.1. Obtain a suitable self-threading screw.
    1.2. Drill a hole into the plug.
    1.3. Install the self-threading screw.
    1.4. Pull on the plug until it has left the bore.

            Important: Use care not to damage the camshaft bearings.

    1.5. An alternate method to remove the plug would be to insert a long shaft or bar through the front of the engine and drive the plug from the bore.

    Object Number: 183593 Size: SH
  2. Remove the engine block expansion plugs from both sides of block.
    3. 2.1. Obtain a suitable self-threading screw.
    2.2. Drill a hole into the plug.
    2.3. Install the self-threading screw.
    2.4. Pull on the plug until it has left the bore.

    Object Number: 69033 Size: SH
  3. Remove the engine block coolant drain hole plugs.

    4. Object Number: 351821 Size: SH
  4. Remove the left side knock sensor shield bolts.
  5. Remove the left side knock sensor shield.

    6. Object Number: 181034 Size: SH
  6. Remove the left side knock sensor (1).
  7. Remove the right side knock sensor (2).

    8. Object Number: 354082 Size: SH
  8. Remove the engine block oil cooler plugs (without oil cooler).

    9. Object Number: 180864 Size: SH
  9. Remove the engine block oil cooler hose fittings (with oil cooler).

    10. Object Number: 180866 Size: SH
  10. Remove the rear oil gallery plugs.

    11. Object Number: 180871 Size: SH
  11. Remove the front oil gallery plugs.

    12. Object Number: 180869 Size: SH
  12. Remove the left side oil gallery plugs.

    13. Object Number: 180870 Size: SH
  13. Remove the top oil gallery plugs.