GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 GMC MD Steel Tilt (W Model) 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, and 6.0L 🢒 Engine Block Plug Installation

Tools Required

J 41712 Oil Pressure Switch Socket or equivalent


    Object Number: 260137 Size: SH

    Important: 

       • Engine block plug, oil gallery and coolant, sealing washers may be used again if not bent, scored or otherwise damaged.
       • Apply the proper amount and type of sealant to the sealing washer as recommended in the service procedure.

  1. Apply a 3.175 mm (0.125 in) bead of sealant to the engine block coolant heater sealing washer, if applicable. Refer to Sealers, Adhesives, and Lubricants .

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the engine block coolant heater to the engine block, if applicable.

    3. Tighten
    Tighten the block coolant heater to 40 N·m (30 lb ft).


    Object Number: 260138 Size: SH
  3. Apply a 3.175 mm (0.125 in) bead of sealant to the engine block left rear coolant drain plug sealing washer, if applicable.
  4. Install the engine block left rear coolant drain plug, if applicable.

    5. Tighten
    Tighten the block left rear coolant drain plug to 60 N·m (44 lb ft).


    Object Number: 63164 Size: SH
  5. Apply a 3.175 mm (0.125 in) bead of sealant to the engine block right rear coolant drain plug sealing washer.
  6. Install the engine block right rear coolant drain plug.

    7. Tighten
    Tighten the block right rear coolant drain plug to 60 N·m (44 lb ft).


    Object Number: 260139 Size: SH
  7. Apply a 3.175 mm (0.125 in) bead of sealant to the engine block left front oil gallery plug sealing washer.
  8. Install the engine block left front oil gallery plug.

    9. Tighten
    Tighten the block left front oil gallery plug to 60 N·m (44 lb ft).


    Object Number: 64923 Size: SH
  9. Apply a 3.175 mm (0.125 in) bead of sealant to the engine block left rear oil gallery plug sealing washer.
  10. Install the engine block left rear oil gallery plug.

    11. Tighten
    Tighten the block left rear oil gallery plug to 60 N·m (44 lb ft).


    Object Number: 63228 Size: MH
  11. Inspect the engine block rear oil gallery plug and O-ring seal. If the O-ring seal on the plug is not cut or damaged, the rear oil gallery plug may be used again.
  12. Lubricate the O-ring seal with clean engine oil.
  13. Install the block rear oil gallery plug into the oil gallery bore. A properly installed block plug will protrude 0.8-1.4 mm (0.0315-0.055 in) beyond the rear face of the block.

    14. Object Number: 64295 Size: SH

    Important: The engine block front oil gallery plug should not be removed unless service is required.

  14. Apply sealant to the sides of the NEW front oil gallery plug.
  15. Install a NEW engine block front oil gallery plug, if required. Install the front oil gallery plug into the oil gallery bore 2.2-2.8 mm (0.0086-0.011 in) below flush.

    16. Object Number: 823316 Size: SH
  16. Apply sealant to the threads of the oil pressure sensor.
  17. Use the J 41712 or equivalent in order to install the oil pressure sensor.

    18. Tighten
    Tighten the oil pressure sensor to 20 N·m (15 lb ft).