Fuel System Pressure Relief

WARNING: This page is about a different car, the 1996 GMC Sonoma and 1996 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Begin fuel system trouble shooting and diagnosis with fuel system pressure test. Relieve fuel system pressure before disconnecting any components or installing fuel pressure gauge.

Fuel system is under pressure, which must be relieved before servicing fuel system. Fuel pressure may be relieved by one of the following methods.

Disconnect negative battery terminal. Loosen fuel filler cap.
Install Fuel Pressure Gauge (J-34730-1A) to fuel pressure test head. Wrap shop towel around pressure connection when installing fuel pressure gauge to absorb fuel leakage. Place gauge bleed hose in container. Open bleed valve to relieve fuel pressure.