LIGHT HAMMER/RATTLE NOISE (REPL.FUEL FEED HOSE ASSY.)

Subject: LIGHT HAMMER/RATTLE NOISE

Model and Year: 1989-92 CAMARO WITH 5.0L OR 5.7L ENGINE

CONDITION:

--------- Some 1989-92 F-cars with 5.OL V-8 engines (RPO LB9) or 5.7L V-8 engines (RPO L98) may exhibit a light hammering/rattle type noise audible in the vehicle passenger compartment.

CAUSE:

----- Pressure pulsations in the fuel system, generated by fuel injector operation, causing hydraulic hammering in chassis fuel pipes.

CORRECTION:

---------- Replace existing underhood fuel feed hose with new hose and damper assembly, P/N 10238701, following applicable Service Manual procedures, Section 6C, Engine Fuel and attached illustration.

PART AVAILABILITY:

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation: L0220

Use applicable Labor Times.

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.