Fuel Tank Draining
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.
WARNING:
Never drain or store fuel in an open container. Always use an approved fuel storage container in order to reduce the chance of fire or explosion. Drain the fuel tank to at least 3/4 of a tank before removing the fuel sender retaining ring or fuel sender access panel in order to avoid possible fuel spillage. Failing to follow this procedure could result in personal injury.
NOTE:
Drain the fuel from the complete system, including injector nozzle(s), the fuel pump, all fuel pipes, and the fuel tank if a vehicle is to be stored for any appreciable length of time. Draining the fuel will prevent the formations of fuel system deposits.
Release the fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Remove the fuel tank filler cap. Drain the fuel through the fuel tank filler pipe by using a hand or air operated fuel pump device. Drain the fuel tank with a hose which has a 0.5" (13 mm) or smaller diameter in order to prevent the drain hose from getting stuck inside the fuel tank filler neck pipe check valve. Damage to the check valve may result.