GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 6.6L 🢒 Fuel Injection Fuel Return Pipe Replacement - Left Side

Removal Procedure

    Object Number: 660477 Size: SH
  1. Remove the lower valve cover. Refer to Valve Rocker Arm Cover Replacement - Lower Left Side in Engine Mechanical - 6.6L.
  2. Remove the return line bolts from injectors and cylinder head.
  3. Remove the return line from the engine.

Installation Procedure

    Object Number: 660477 Size: SH

    Important: Always install new copper gaskets on the fuel injector lines.

  1. Install the return line on the injectors.

    2. 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.

  2. Install the return line bolts to injectors and cylinder head.

    3. Tighten
    Tighten the return line bolts to 16 N·m (12 lb ft).

  3. Install the lower valve cover. Refer to Valve Rocker Arm Cover Replacement - Lower Left Side in Engine Mechanical 6.6L.