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Home >> GMC >> 2004 >> Canyon 2D Pickup, 2.8 8, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 2.8L (Introduction) >> Repair Instructions >> Fuel Rail Assembly Replacement >> Removal Procedure

Removal Procedure

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
  2. Refer to Quick Connect Fitting(s) Service (Metal Collar)  in order to disconnect the following from the fuel rail:
    • The fuel return hose/pipe (1)
    • The fuel feed hose/pipe (2)
    3. Fig 1: View Of EVAP Pipes, Fuel Pipes, Oil Indicator Tube, & Engine Wiring Harness Bracket
    GM1361724Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the atmospheric vent hose (2) from the following:
    • The air cleaner resonator (1)
    • The fuel pressure regulator (3)
    4. Fig 2: View Of Air Cleaner Resonator, Atmospheric Vent Hose & Fuel Pressure Regulator
    GM1352028Courtesy of GENERAL MOTORS CORP.
  4. Refer to Quick Connect Fitting(s) Service (Plastic Collar)  in order to disconnect the evaporative emission (EVAP) purge hose (1) from the following:
    • The throttle control module (2)
    • The EVAP canister purge solenoid valve (3)
    5. Fig 3: View Of EVAP Canister Purge Pipe, Throttle Body Module & EVAP Canister Purge Solenoid Valve
    GM1352026Courtesy of GENERAL MOTORS CORP.
  5. Remove the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical-2.8L (LK5).
  6. Disconnect the fuel injector harness connector (2) from the engine wiring harness electrical connector.
    7. Fig 4: View Of ECT Sensor, Fuel Injector, Ignition Coil & HO2S Engine Wiring Harness Electrical Connectors
    GM1350694Courtesy of GENERAL MOTORS CORP.
  7. Before removal, clean the fuel rail assembly and the cylinder head with a spray type engine cleaner, GM X-30A or equivalent, if necessary. Follow the package instructions. Do not soak the fuel rail in liquid cleaning solvent.
  8. Remove the fuel rail bolts.
    9. Fig 5: View Of Fuel Rail Assembly
    GM953945Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.
  9. Remove the fuel rail from the cylinder head.
  10. Remove the fuel injector lower O-ring seal (4) from the spray tip end of each fuel injector (3).

    Discard the O-ring seal (4).

    11. Fig 6: View Of Fuel Injector, Clip & O-Rings
    GM351185Courtesy of GENERAL MOTORS CORP.
  11. If the fuel rail is not being replaced, go to the Installation Procedure.
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