GM Service Manual Online
For 1990-2009 cars only

Tools Required

SA9127E Gage Bar Set

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.

    Caution: Do not allow smoking or the use of open flames in the area where work on the fuel or EVAP system is taking place. Anytime work is being done on the fuel system, disconnect the negative battery cable, except for those tests where battery voltage is required.

  1. Disconnect the negative battery cable.

  2. Object Number: 898897  Size: SH
  3. Disconnect the intake air temperature (IAT) sensor connector.
  4. Loosen the clamp at the air cleaner assembly.
  5. Remove the push pin attachment from the outlet resonator/duct assembly to support bracket.
  6. Loosen the clamp at the throttle body assembly.
  7. Disconnect the positive crankcase ventilation (PCV) fresh air vent hose at the cam cover.
  8. Remove the outlet resonator/duct assembly.

  9. Object Number: 854376  Size: SH

    Caution: Whenever fuel line fittings are loosened or disconnected, wrap a shop cloth around the fitting to collect fuel. Place the cloth in an approved container.

  10. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  11. Disconnect the SA9127E after the pressure has been relieved.

  12. Object Number: 947047  Size: SH
  13. Remove the fuel dampener bolts.
  14. Remove the fuel pressure dampener and O-ring seals.
  15. Visually inspect the seals for cuts, nicks, or flatness. Replace as necessary.

Installation Procedure


    Object Number: 854298  Size: SH

    Important: O-rings must be lubricated with clean engine oil and installed into the fuel rail before the fuel pressure regulator is installed.

  1. Install the small oiled O-ring (4) into the fuel rail.
  2. Install the large oiled O-ring (7) into the fuel rail.

  3. Object Number: 947047  Size: SH
  4. Install the fuel pressure regulator into the fuel rail.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. Install the retaining bolts.
  7. Tighten
    Tighten the fuel pressure dampener bolts to 5 N·m (44 lb in).


    Object Number: 898897  Size: SH
  8. Install the outlet resonator/duct assembly into position.
  9. Connect the PCV fresh air vent hose assembly.
  10. Tighten the clamp at the throttle body assembly.
  11. Position the outlet resonator/duct assembly up with a support bracket and install the push pin.
  12. Tighten the clamp at the air cleaner assembly.
  13. Connect the IAT sensor connector.
  14. Connect the negative battery cable.
  15. Tighten
    Tighten the battery terminal bolt to 17 N·m (13 lb ft).

  16. Run the vehicle and inspect for leaks.