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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 380 (ENGINE CONTROLS - 6.6L (LB7) (INTRODUCTION))REPAIR INSTRUCTIONSFUEL INJECTION PUMP REPLACEMENTPREPARING THE FUEL PUMP
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Preparing The Fuel Pump

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Preparing The Fuel Pump
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Hold the fuel pump by the drive gear in a vice with copper jaw liners.
  2. Loosen the gear nut until the nut is even with the end of the gear shaft.
  3. Remove the gear from the tapered shaft of the pump.
  4. Separate the pump and adapter by removing the three bolts and spacers.
  5. Inspect the O-ring for damage on pump adapter and replace, if necessary. Lubricate the O-ring with clean engine oil.
  6. Clean all mating surfaces.
  7. Install the adapter on the pump.
    8. NOTE: Refer to Fastener Notice in Cautions and Notices.
  8. Using the three bolts and spacers, reassemble the pump.

    Tighten:  Tighten the bolts to 20 N.m (15 lb ft).

  9. Replace the gear and nut.

    Tighten:  Tighten nut to 70 N.m (52 lb ft).

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.