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Home › Chevrolet › 2010 › Cutaway 6.6 L › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Controls And Fuel - 6.6L (LGH) - Repair Instructions › Repair Instructions › Emission Reduction Fluid Supply Pump Module Replacement › Installation Procedure

Installation Procedure

    Fig 1: Reservoir Cover Smaller O-Ring Seal
    GM2767967Courtesy of GENERAL MOTORS COMPANY
  1. Carefully install the new supply pump to reservoir cover o-ring seals. Position the smaller o-ring seal (1) over the port on the underside of the supply pump, and position the larger o-ring seal (2) into the port on the reservoir cover.
    2. Fig 2: DEF Supply Pump Module
    GM2767924Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  2. Position the supply pump module (2) onto the reservoir cover and carefully press down into place.
  3. Install the 3 supply pump module retaining bolts (1), and tighten the bolts to 5 (44 lb in).
    4. Fig 3: Fuel Pump, Fuel Pressure Sensor, And Fuel Reverting Valve
    GM2767926Courtesy of GENERAL MOTORS COMPANY
  4. Connect the DEF wiring jumper harness connectors to the pump (1), pressure sensor (2), and reverting valve (3).
  5. Install the DEF supply pump module insulators.
  6. Install the DEF tank. Refer to Emission Reduction Fluid Tank Replacement .
  7. Fill the DEF tank with approved DEF fluid.
  8. With system operational, inspect for DEF fluid leaks.
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