GM Service Manual Online
For 1990-2009 cars only

FUEL LINES FUEL INJ. ENGINES REPLACE WHEN NECESSARY

FUEL LINES ON ALL MULTI-PORT FUEL INJECTED ENGINES

The fuel system used on vehicles equipped with multi-port fuel injection (MFI) engines operates at a higher pressure than carbureted or throttle body injected engines.

Should any fuel hose used with this engine application require replacement, it should be ordered from WDDGM.

No attempt should be made to make field repairs.

The 1985 Service Manual should be reviewed for specific fuel system pressure diagnosis and repairs.

MFI USAGE

Series A F F J N P ------- - - - - - - Displacement 2.8L 2.8L 5.0L 1.8L Turbo 3.0L 2.8L UPC Code LB6 LB8 LB9 LA5 LN7 L44 VIN Code W S F J L 9

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.