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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 381 (ENGINE CONTROLS - 6.6L (LLY) (INTRODUCTION))REPAIR INSTRUCTIONSFUEL RAIL ASSEMBLY REPLACEMENT - BANK 2REMOVAL PROCEDURE
2006 Chevrolet Suburban C2500, 6.0 U

Removal Procedure

2006 Chevrolet Suburban C2500, 6.0 USECTION Removal Procedure
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Fuel Rail Balance Pipe & Bolts
    GM1335586Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cables. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  3. Remove the fuel injection control module (FICM). Refer to Fuel Injection Control Module Replacement .
  4. Remove the fuel filter. Refer to Fuel Filter Replacement .
  5. Remove the exhaust gas recirculation (EGR) cooler tube. Refer to Exhaust Gas Recirculation (EGR) Valve Cooler Tube Replacement .
  6. Remove the positive crankcase ventilation (PCV) hose/pipe. Refer to Crankcase Ventilation Hoses/Pipes Replacement in Engine Mechanical - 6.6L (LLY).
  7. Disconnect the fuel rail balance pipe from the fuel rails.
  8. Remove the fuel rail balance pipe bolts.
  9. Remove the fuel rail balance pipe.
    10. Fig 2: View Of Fuel Injector Pipes
    GM1335614Courtesy of GENERAL MOTORS CORP.
  10. Prior to removing the fuel injector pipes, use compressed air to blow any debris from between the injector line and fittings. Wipe the fittings clean of debris.
  11. Spray lithium grease, GM P/N 12346293 or equivalent, between the fuel injector line and fittings to assist in containing any debris during removal.
    12. NOTE: DO NOT use compressed air to clean debris from the fuel injector inlet after the fuel line is removed. Using compressed air can allow debris to enter the fuel injector inlet and damage the fuel injector.
  12. Remove the fuel injector pipes.
    13. Fig 3: View Of Right Fuel Rail
    GM1335617Courtesy of GENERAL MOTORS CORP.
  13. Remove the fuel rail bolts.
  14. Remove the fuel rail.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.