Q: How to replace a fuel filter in a Pontiac Grand Prix?
A: Relieve the fuel system pressure. Raise the vehicle and support it securely on jackstands. Unscrew the fuel line-to-fuel filter fittings. Use a back-up wrench on the fuel filter side of the fitting; use a flare-nut wrench to unscrew the outer nut. Use a back-up wrench to keep from twisting the line. If the car is equipped with plastic "quick-connect" fittings, squeeze the tabs on the fitting and pull it apart. If the car is equipped with metal quick-connect fittings, pull back the rubber boot and twist the fitting one-quarter turn to loosen any dirt. Then, if compressed air is available, blow the dirt away from the connection. Use a special fuel line separator tool to disconnect the fitting. Remove the filter from the clip. Snap the new filter securely into the clip. Make sure the arrow on the filter points toward the engine. Using new O-rings, reattach the fuel lines to the filter. Apply a few drops of clean engine oil to the O-rings to ease reassembly.