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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 434 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 5.3L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSFUEL INJECTION FUEL RAIL ASSEMBLY REPLACEMENTREMOVAL PROCEDURE
2008 Pontiac Grand Prix Base

Removal Procedure

2008 Pontiac Grand Prix BaseSECTION Removal Procedure
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Clean the fuel and evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the lines in order the avoid possible system contamination.
    Fig 1: View Of Electrical Connectors
    GM1551867Courtesy of GENERAL MOTORS CORP.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (With CH 48027) or Fuel Pressure Relief (Without CH 48027) .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  3. Disconnect the following electrical connectors:
    • EVAP purge solenoid (1)
    • Manifold absolute pressure (MAP) sensor (2)
    • Electronic throttle control (ETC) (3)
    • Oil pressure sensor (4)
    • Valve lifter oil manifold (5)
    4. Fig 2: View Of Generator Electrical Connectors
    GM1552786Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the generator electrical connector (2).
    5. Fig 3: View Of Ignition Coil Main Electrical Connectors
    GM1551870Courtesy of GENERAL MOTORS CORP.
  5. Remove the connector position assurance (CPA) retainer (3).
  6. Disconnect the main ignition coil harness electrical connector (4).
    7. IMPORTANT: Mark the injector connectors to their corresponding injectors to ensure correct reassembly.
  7. Disconnect the fuel injector electrical connectors (1, 2).
    8. Fig 4: View Of Ignition Coil Main Electrical Connectors
    GM1551871Courtesy of GENERAL MOTORS CORP.
  8. Remove the CPA retainer (3).
  9. Disconnect the main ignition coil harness electrical connector (1).
    10. IMPORTANT: Mark the injector connectors to their corresponding injectors to ensure correct reassembly.
  10. Disconnect the fuel injector electrical connectors (2, 4).
    11. Fig 5: View Of Engine Wiring Harness & Retainers
    GM1551869Courtesy of GENERAL MOTORS CORP.
  11. Remove the engine wiring harness retainers from the tabs on the fuel rail. Reposition the harness out of the way.
    12. Fig 6: View Of Fuel Feed Line & Evaporative Emission (EVAP) Line
    GM1551868Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the fuel feed (1) and EVAP (2) lines. Refer to Metal Collar Quick Connect Fitting Service  and Plastic Collar Quick Connect Fitting Service .
    13. Fig 7: View Of Fuel Rail Ground Strap
    GM1411903Courtesy of GENERAL MOTORS CORP.
  13. Note the location of the fuel rail ground strap (557).
    14. Fig 8: View Of Fuel Rail Bolts, Ground Strap & Manifold Bolts
    GM1411905Courtesy of GENERAL MOTORS CORP.
  14. Remove the intake manifold bolt (512) and ground strap (557).
  15. Remove the fuel rail bolts (511).
  16. Remove the fuel rail (510) with injectors. Lift evenly on both sides of the fuel rail until all injectors have been removed from their bores.
    17. IMPORTANT: Do not separate the fuel injectors from the fuel rail unless component service is required.
  17. If replacing the fuel rail, remove the fuel injectors. Refer to Fuel Injector Replacement .
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.