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Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 281 (Engine Control System & Fuel System - 3.7L - Introduction, Service & Repair) >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Canyon and 2009 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Fuel Feed Line Quick Connect Fitting
    GM1772037Courtesy of GENERAL MOTORS CORP.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (Without CH-48027) or Fuel Pressure Relief (With CH 48027) .
  2. Disconnect the fuel feed line quick connect fitting (1) from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
    3. Fig 2: View Of EVAP Canister Purge Pipe, Throttle Body Module & EVAP Canister Purge Solenoid Valve
    GM1352026Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the evaporative emission (EVAP) purge tube from the throttle body control module (2) and the EVAP canister purge solenoid valve (3). Refer to Plastic Collar Quick Connect Fitting Service .
  4. Remove the intake manifold. Refer to Intake Manifold Replacement .
    5. Fig 3: View Of Engine Wiring Harness Electrical Connectors
    GM1765153Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the engine wiring harness electrical connector (1) from the fuel injector harness electrical connector.
  6. 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.
    7. Fig 4: View Of Fuel Rail To Cylinder Head
    GM1772116Courtesy of GENERAL MOTORS CORP.
  7. Remove the fuel rail bolts.
    8. CAUTION:
    • 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.
  8. Remove the fuel rail from the cylinder head.
    9. Fig 5: View Of Fuel Injector Lower O-Ring Seals
    GM1772114Courtesy of GENERAL MOTORS CORP.
  9. Remove and discard the fuel injector lower O-ring seals from each fuel injector.
  10. If the fuel rail is not being replaced, proceed to the Installation Procedure.
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