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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1137 (Engine Controls And Fuel - 3.6L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LLT) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (With CH 48027 - LY7)  or Fuel Pressure Relief (Without CH 48027 - LY7)  or Fuel Pressure Relief (With High Pressure Pump - LLT) .
  2. Remove the cross vehicle brace. Refer to Cross Vehicle Brace Replacement .
  3. Remove the fuel pipe shield. Refer to Fuel Pipe Shield Replacement (LLT) .
  4. Remove the intake manifold. Refer to Intake Manifold Replacement .
  5. Remove the foam insulator from the fuel rails.
    6. Fig 1: Removing/Installing Fuel Pressure Sensor From Fuel Injection Fuel Rail
    GM1977753Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the fuel injector wiring harness electrical connector (1) from the fuel injectors, fuel rail and fuel pressure sensor.
  7. Remove the high pressure fuel sensor. Refer to Fuel Pressure Sensor Replacement (LLT) .
  8. Remove the High pressure fuel pipe. Refer to Fuel Feed Intermediate Pipe Replacement (LLT) . Discard this pipe.
  9. Remove the fuel rail crossover pipe. Refer to Fuel Injection Fuel Rail Crossover Tube Replacement (LLT) . Discard this pipe.
    10. Fig 2: Identifying Fuel Rail Bolts
    GM1977744Courtesy of GENERAL MOTORS CORP.
  10. Remove the fuel rail bolts (1).
  11. Carefully remove the bank one fuel rail (2) from the engine. Lift the rear of the rail to ease removal.
  12. Remove and discard the direct fuel injector hold down clamps.
    13. IMPORTANT: The direct fuel injectors must be rebuilt whenever the injector has been released from the fuel rail or cylinder head.
  13. Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to Fuel Injector Replacement (LLT) .
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