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Home >> Chevrolet >> 2009 >> Cutaway 6.6 6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.6L LMM - Introduction >> Repair Instructions >> Fuel Pressure Regulator Replacement >> Installation Procedure

Installation Procedure

NOTE: If the pressure regulator is being re-used, check the O-rings for damage. If the O-rings are damaged, install NEW O-rings.
    Fig 1: Fuel Pressure Regulator
    GM901301Courtesy of GENERAL MOTORS CORP.
    NOTE: If the regulator is installed at an angle the O-rings may be damaged, resulting in possible fuel leakage.
  1. Lubricate and install NEW O-rings onto the regulator. Lubricate the O-rings with clean, NEW engine oil.
  2. Install the fuel pressure regulator (1).
    3. Fig 2: Fuel Pressure Regulator Screws
    GM901300Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  3. Install the 3 fuel pressure regulator screws (1) using a T25 TORX®.
    • Tighten the screws a first pass to 4 N.m (35 lb in).
    • Tighten the screws a final pass to 7 N.m (62 lb in).
  4. Install the distribution block hoses to the distribution block.
  5. Position the distribution block hose clamps.
    6. Fig 3: Fuel Pressure Regulator Electrical Connector
    GM786996Courtesy of GENERAL MOTORS CORP.
  6. Connect the fuel pressure regulator electrical connector (1).
  7. Install the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  8. Install the center intake manifold. Refer to Center Intake Manifold Replacement (LMM) .
  9. Prime the fuel system. Refer to Fuel System Priming .
  10. Start the engine.

    If the engine stalls, repeat the above step.

  11. Once the engine starts, inspect for fuel leaks.
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