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Preparing The Fuel Pump

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. If installing a NEW fuel injection pump, use this procedure to prepare pump prior to installation. Hold the original fuel pump by the drive gear in a vice with copper jaw liners. Loosen the gear nut until the nut is even with the end of the gear shaft. Remove the gear from the tapered shaft of the pump. Separate the pump and adapter by removing the three bolts and spacers.
  2. Inspect the "O" ring for damage on pump adapter and replace, if necessary. Lubricate the "O" ring with clean engine oil. Clean all mating surfaces. Install the adapter on the pump.
  3. Using the three bolts and spacers, reassemble the pump. Tighten the fuel injection adaptor bolts to specification. See TORQUE SPECIFICATIONS . Replace the gear and nut. Tighten nut to specification.
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