LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2001 >> Sierra 2500 HD, 2D Pickup, 6.6 1, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.6L - Repair Instructions >> Repair Instructions >> Fuel Pressure Regulator Replacement >> Removal Procedure

Removal Procedure

    Fig 1: View Of A/C Compressor & Bolts
    GM652573Courtesy of GENERAL MOTORS COMPANY
  1. Remove the air intake pipe. Refer to Air Intake Pipe Replacement .
  2. Disconnect the air conditioning (A/C) compressor clutch electrical connector.
  3. Disconnect the A/C cut out switch electrical connector.
  4. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 6.6L.
  5. Remove the A/C compressor bolts.
  6. Move the A/C compressor with the hoses attached to the right side of the engine compartment.
    7. Fig 2: View Of Main Engine Harness Electrical Connectors
    GM674653Courtesy of GENERAL MOTORS COMPANY
  7. Remove the water outlet tube. Refer to Water Outlet Tube Replacement in Engine Cooling.
  8. Disconnect both main harness electrical connectors.
    9. Fig 3: View Of Engine-To-Chassis Harness Connector & Bracket Bolts
    GM674680Courtesy of GENERAL MOTORS COMPANY
  9. Remove both main harness electrical connector to bracket bolts (1).
  10. Remove the main harnesses from the bracket.
    11. Fig 4: ECT Sensor Electrical Connector
    GM740506Courtesy of GENERAL MOTORS COMPANY
  11. Disconnect the engine coolant temperature (ECT) sensor electrical connector (1).
    12. Fig 5: BARO Sensor Electrical Connector
    GM739503Courtesy of GENERAL MOTORS COMPANY
  12. Disconnect the barometric pressure (BARO) sensor electrical connector (1).
    13. Fig 6: Glow Plug Relay Electrical Connectors
    GM786978Courtesy of GENERAL MOTORS COMPANY
  13. Disconnect the glow plug relay electrical connectors (1, 2, 3).
    14. Fig 7: Fuel Rail Temperature Sensor Electrical Connector
    GM786977Courtesy of GENERAL MOTORS COMPANY
  14. Disconnect the fuel rail temperature sensor electrical connector (1).
    15. Fig 8: Left Front Fuel Injector Electrical Connector
    GM786986Courtesy of GENERAL MOTORS COMPANY
  15. Disconnect the left front fuel injector electrical connector (1).
    16. Fig 9: Left Rear Fuel Injector Electrical Connector
    GM786988Courtesy of GENERAL MOTORS COMPANY
  16. Disconnect the left rear fuel injector electrical connector (1).
    17. Fig 10: Fuel Pressure Regulator Electrical Connector
    GM786996Courtesy of GENERAL MOTORS COMPANY
  17. Disconnect the fuel pressure regulator electrical connector (1).
    18. Fig 11: Oil Level Electrical Connector
    GM788846Courtesy of GENERAL MOTORS COMPANY
  18. Disconnect the oil level sensor harness electrical connector (1).
    19. Fig 12: View Of Crankcase Ventilation Hoses At Valve Rocker Arm Covers
    GM687021Courtesy of GENERAL MOTORS COMPANY
  19. Remove the positive crankcase ventilation (PCV) hose from both valve covers.
    20. Fig 13: Injection Pump Inlet Hose At Fuel Feed Distribution Block
    GM901298Courtesy of GENERAL MOTORS COMPANY
  20. Reposition the injection pump inlet clamp.
  21. Remove the injection pump inlet hose from the fuel feed distribution (leak-off) block. Reposition the hose.
    22. Fig 14: Fuel Pressure Regulator Screws
    GM901300Courtesy of GENERAL MOTORS COMPANY
  22. Clean the fuel pressure regulator and high pressure injection pump thoroughly with solvent, such as GM P/N 12377981 (Canadian P/N 10953463), or equivalent.
  23. Using compressed air, thoroughly blow dry the regulator and pump.
  24. Remove the 3 fuel pressure regulator screws (1) using a T25 TORX®.
    25. Fig 15: Fuel Pressure Regulator
    GM901301Courtesy of GENERAL MOTORS COMPANY
    IMPORTANT:

    DO NOT use compressed air to remove debris while the fuel pressure regulator is removed.

  25. Remove the fuel pressure regulator (1).
  26. If dirt or debris is found in the bore or seating surfaces of the fuel injection pump, perform the following:
    • Place a clean rag over the pump bore in order to collect the excess fuel.
    • Bump the engine over in order to flush any debris out of the regulator bore.
scientia non olet · About LEMON Manuals