GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Sierra - 4WD 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, and 6.0L 🢒 Engine Coolant Air Bleed Pipe Installation

    Object Number: 64262 Size: SH
  1. Install the gaskets onto the engine coolant air bleed pipe.

    2. Position the gasket O-ring seal onto the nipple portion of the pipe.


    Object Number: 260118 Size: SH

    Important: Route the knock sensor wire harness over the top of the engine coolant air bleed pipe. The pipe and knock sensor wire harness should be installed in a manner as to allow the removal of the wire harness without requiring the removal of the pipe.

  2. Install the pipe and gaskets onto the cylinder heads.

    3. 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 pipe bolts.

    4. Tighten
    Tighten the pipe bolts to 12 N·m (106 lb in).


    Object Number: 492760 Size: SH
  4. Install the hose and clamp (2) onto the pipe.