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Fuel System Pressure Release

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Remove the rear seat cushion. Disconnect negative battery terminal. Loosen fuel filler cap. Remove mounting the 2 mounting nuts from the injector sight shield (top engine cover).
  2. Lift the sight shield from the front and pull forward to disengage the rear tab from the bracket. Install Fuel Pressure Gauge (J-34730-1A) to fuel pressure connector of fuel rail. See Fig 1 . Wrap shop towel around pressure connection when installing fuel pressure gauge to absorb fuel leakage.
  3. Install gauge bleed hose into an approved container. Open bleed valve to bleed fuel pressure.
Fig 1: Connecting Fuel Pressure Gauge (J 34730-1A)
G00217341Courtesy of GENERAL MOTORS CORP.