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Home >> Cadillac >> 2013 >> XTS AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls/Fuel - 3.6L (LFX) - Repair Instructions >> Repair Instructions >> Fuel Pump Replacement >> Removal Procedure
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Removal Procedure

  1. Relieve the low and high side fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement (LFX) .
    3. Fig 1: Identifying High Pressure Fuel Pump Components
    GM2221135Courtesy of GENERAL MOTORS COMPANY
  3. Disconnect the engine wiring harness electrical connector from the high pressure fuel pump.
  4. Remove the low pressure feed pipe. Refer to Fuel Feed Pipe Replacement (At Engine) , Fuel Feed Pipe Replacement (At Tank FWD) , Fuel Feed Pipe Replacement (At Tank AWD) .
  5. Remove the high pressure pipe. Discard the pipe. Refer to Fuel Feed Intermediate Pipe Replacement .
  6. Remove and discard the high pressure fuel pump bolts (1).
  7. Remove the high pressure fuel pump (2).
  8. Remove and discard the high pressure fuel pump O-ring (3).
  9. Remove and discard the high pressure fuel pump gasket (4).
  10. Remove the high pressure fuel pump roller lifter (5).
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