Removal Procedure

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.

Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief Procedure .
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.

Fig 1: Locating Fuel Feed And Fuel Return Pipe Quick-Connect Fitting

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Disconnect the quick-connect fittings in the engine compartment. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
Plug the chassis fuel feed pipe and the chassis fuel return pipe as required.
Remove the upper intake manifold assembly. Refer to Intake Manifold Replacement - Upper in Engine Mechanical.

Fig 2: View Of Fuel Return Pipe

Courtesy of GENERAL MOTORS CORP.

Disconnect the engine fuel return pipe from the fuel pressure regulator. Discard the O-ring.

Fig 3: Identifying Engine Fuel Feed Pipe

Courtesy of GENERAL MOTORS CORP.

Disconnect the engine fuel feed pipe from the fuel rail. Discard the O-ring.