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Home >> Chevrolet >> 2001 >> C3500 HD 8.1 G, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L - Repair Instructions >> Repair Instructions >> Fuel Pressure Regulator Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: View Of Fuel Rail & Related Components
    GM705539Courtesy of GENERAL MOTORS COMPANY
  1. Install the backup ring (10) on the fuel pressure regulator (8).
  2. Install the new large O-ring (11) on the fuel pressure regulator.
  3. Install the regulator filter (12) on the fuel pressure regulator.
  4. Install the new small O-ring (13) on the fuel pressure regulator.
  5. Lubricate the fuel pressure regulator large O-ring and the small O-ring with clean engine oil.
  6. Push the fuel pressure regulator into the regulator housing on the fuel rail.
  7. Install a new fuel pressure regulator retainer (9).
    8. Fig 2: View Of Fuel Pressure Regulator Vacuum Line
    GM665447Courtesy of GENERAL MOTORS COMPANY
  8. Connect the fuel pressure regulator vacuum line (1).
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Auxiliary Battery) , Battery Negative Cable Disconnection and Connection (Single Battery) in Engine Electrical.
  10. Tighten the fuel filler cap.
  11. Inspect for leaks using the following procedure:
    1. Turn ON the ignition, with the engine OFF, for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition, with the engine OFF.
    4. Inspect for fuel leaks.
    12. Fig 3: Intake Manifold Sight Shield, Bolts & Retainer
    GM665445Courtesy of GENERAL MOTORS COMPANY
  12. Install the fuel injector sight shield (2).
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