GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Chevy K Silverado - 4WD 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Fuel Injection Pump Cleaning and Inspection

    Object Number: 663766 Size: SH
  1. Remove the fuel injection pump adapter bolts.
  2. Remove the fuel injection pump adapter.

    3. Object Number: 663767 Size: SH
  3. Remove the O-ring from the fuel injection pump and discard.
  4. Remove the O-ring from the fuel injection pump adapter and discard.
  5. Clean the fuel injection pump adapter mating surfaces.
  6. Clean the fuel injection pump mating surfaces.
  7. Inspect the fuel injection pump and adapter for damage.
  8. Replace component if any damage is found.
  9. Install a new O-ring onto fuel injection pump.
  10. Install a new O-ring onto fuel injection pump adapter.
  11. Lubricate the O-rings with engine oil.

    12. Object Number: 663766 Size: SH
  12. Install the fuel injection pump adapter to the fuel injection pump.

    13. 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.

  13. Install the fuel injection pump adapter bolts.

    14. Tighten
    Tighten the fuel injection pump adapter bolts to 21 N·m (15 lb ft).