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Fuel Pressure Regulator: Installation

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: If reusing fuel pressure regulator, inspect filter screen for contamination. If filter screen is contaminated, replace fuel pressure regulator.
  1. Lubricate new "O" rings with clean engine oil. Install back-up ring, upper "O" ring, filter and lower "O" ring. Install fuel pressure regulator with vacuum tube pointing down toward retaining clip.
  2. Install fuel pressure regulator retaining clip. Install upper intake manifold. See INTAKE MANIFOLD . Connect negative battery cable. Tighten battery cable bolts to specification. See TORQUE SPECIFICATIONS .
  3. Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary.


  1. Install back-up ring, "O" ring, fuel pressure regulator filter and remaining "O" ring onto the fuel pressure regulator. Lubricate the fuel pressure regulator "O" rings with clean engine oil. Install the fuel pressure regulator.
  2. Ensure that the new fuel pressure regulator retainer is the correct one. The tabs are used on the straight vacuum port retainer, and the E85-straight vacuum port retainer. The angle vacuum port retainer has no tabs.
  3. Install New fuel pressure regulator retainer. Connect fuel pressure regulator vacuum line. Install the fuel fill cap. Connect the negative battery cable and tighten bolt to specification. See TORQUE SPECIFICATIONS .
  4. Turn ignition switch to on position for 2 seconds. Turn ignition switch to off position for 10 seconds. Turn ignition switch to on position. Check for fuel leaks. Repair as necessary.
  5. Install engine sight shield. See ENGINE SIGHT SHIELD  under MISCELLANEOUS.


  1. Install back-up ring onto fuel pressure regulator, followed by the large "O" ring, fuel pressure regulator filter and small "O" ring. See Figure. Lubricate large and small fuel pressure regulator "O" rings with clean engine oil.
  2. Push fuel pressure regulator into fuel pressure regulator housing on fuel rail. Install a new fuel pressure regulator retainer. Connect fuel pressure regulator vacuum line. Install the fuel fill cap.
  3. Connect the negative battery cable and tighten bolt to specification. See TORQUE SPECIFICATIONS .
  4. Turn ignition switch to on position for 2 seconds. Turn ignition switch to off position for 10 seconds. Turn ignition switch to on position. Check for fuel leaks. Repair as necessary.
  5. Install the engine sight shield. See ENGINE SIGHT SHIELD  under MISCELLANEOUS.
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