3.1L & 3.4L
WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Disconnect negative battery terminal. Loosen fuel filler cap. Install Adapter (J-34730-262) to fuel pressure connector of fuel rail. Install Fuel Pressure Gauge (J-34730-1A) to adaptor. Ensure fuel gauge does not interfere with drive belt. Wrap shop towel around pressure connection when installing fuel pressure gauge to absorb fuel leakage. Install gauge bleed hose into an approved container. Open bleed valve to bleed fuel pressure.