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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 87 (ENGINE CONTROLS - REMOVAL, OVERHAUL & INSTALLATION)FUEL SYSTEMSFUEL PUMPREMOVAL
1999 GMC Forward Control 5.7 R, Automatic

Fuel Pump: Removal

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Fuel pump is located in fuel tank and is integral with fuel sending unit assembly. Fuel pump must be replaced with fuel sending unit as an assembly. Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Drain fuel tank. See FUEL TANK DRAINING .
  2. Remove the rear compartment floor trim. Remove spare tire cover, jack and spare tire, if necessary. Remove the fuel sender access panel bolts. Remove the fuel sender access panel. In order to prevent damage from fuel, cover the fuel pipe fittings with a shop towel before disconnecting the fuel pipes or removal of the fuel sender retaining ring. Place the towel in an approved container when procedure is completed.
  3. Disconnect the fuel sender quick-connect fittings. See FUEL LINE DISCONNECT FITTINGS . Disconnect the fuel sender electrical connector. Disconnect the fuel tank pressure sensor electrical connector. See Figure.
    4. CAUTION: The modular fuel sender assembly will spring-up when the locking ring is removed. Do not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints. When removing the fuel sender assembly from the fuel tank, the reservoir bucket on the fuel sender is full of fuel. The fuel sender must be tipped slightly during removal in order to avoid damage to the float. Place any remaining fuel into an approved container once the fuel sender is removed from the fuel tank.
  4. Using Fuel Sender Lock Nut Wrench (J-39765), remove the fuel sender retaining ring. Remove the fuel sender assembly. Clean the fuel sender sealing surfaces. Inspect the fuel sender sealing surfaces.
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.