GM Service Manual Online
For 1990-2009 cars only
  1. Install the engine block coolant drain plugs.
  2. • Apply gasket paste to the plugs before installation

    Tighten
    Coolant Jacket Plugs to 15 N·m (11 lb ft).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the cooling jacket core plugs.
  4. Apply gasket paste to the plugs before installation

  5. Object Number: 4904  Size: SH
  6. Drive the plugs into the block until they are flush using a drift that closely matches the inside diameter of the plug.