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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 547 (ENGINE CONTROLS - 3.4L - INTRODUCTION - SERVICE & REPLACEMENT)REPAIR INSTRUCTIONSFUEL HOSE/PIPES REPLACEMENT - ENGINE COMPARTMENTREMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Do not attempt to repair the engine fuel feed pipe or the engine fuel return pipe. Replace a damaged engine fuel feed pipe or the engine fuel return pipe.
  1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief Procedure .
  2. Clean all engine fuel pipe connections and areas surrounding the engine fuel pipe connections before disconnecting the engine fuel pipe connections to avoid possible contamination of the fuel system.
    3. Fig 1: Locating Fuel Feed And Fuel Return Pipe Quick-Connect Fitting
    GM49740Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the quick-connect fittings in the engine compartment. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  4. Plug the chassis fuel feed pipe and the chassis fuel return pipe as required.
  5. Remove the upper intake manifold assembly. Refer to Intake Manifold Replacement - Upper in Engine Mechanical.
    6. Fig 2: View Of Fuel Return Pipe
    GM22507Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the engine fuel return pipe from the fuel pressure regulator. Discard the O-ring.
    7. Fig 3: Identifying Engine Fuel Feed Pipe
    GM22505Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the engine fuel feed pipe from the fuel rail. Discard the O-ring.
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.