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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 381 (ENGINE CONTROLS - 6.6L (LLY) (INTRODUCTION))REPAIR INSTRUCTIONSFUEL INJECTOR REPLACEMENT (RIGHT)REMOVAL 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 Charged Air Cooler Outlet Duct
    GM1334381Courtesy of GENERAL MOTORS CORP.
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  2. Loosen the charged air cooler outlet duct to intake hose clamp.
    IMPORTANT: Do not use a screwdriver or other tool to pry the hose loose. The hose can be torn or damaged. Loosen the hose by twisting.
  3. Remove the charged air cooler outlet duct from the intake.
  4. Remove the fuel filter and bracket. Refer to Fuel Filter Replacement .
  5. Remove the fuel injection control module (FICM). Refer to Fuel Injection Control Module Replacement .
    6. Fig 2: View Of Fuel Injector Pipes
    GM1335614Courtesy of GENERAL MOTORS CORP.
  6. 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.
  7. Spray lithium grease, GM P/N 12346293 or equivalent, between the fuel injector line and fittings to assist in containing any debris during removal.
    8. 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.
  8. Remove the fuel injector pipes.
    9. Fig 3: View Of Right Fuel Return Hose & Injectors
    GM1335592Courtesy of GENERAL MOTORS CORP.
  9. Remove the fuel return hose clips.
  10. Remove the fuel return hose from the injectors.
    11. Fig 4: View Of Fuel Injector Electrical Connectors
    GM1335536Courtesy of GENERAL MOTORS CORP.
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.