REAR UNDER BODY RATTLE WITH N10 DUAL CAT. CONVERTERS

SUBJECT: REAR UNDERBODY BUZZ OR RATTLE ON VEHICLES WITH N10 DUAL CATALYTIC CONVERTERS (INSTALL RUBBER BUMPER)

VEHICLES AFFECTED: 1988-91 'F' CARS

CONDTTTON:

---------- Rear Underbody buzz or rattle on vehicles equipped with N10 exhaust (Dual Catalytic Converters).

CAUSE:

------- Heat shields hits floor pan.

CORRECTION:

------------ Install rubber bumper P/N #10164154 at location shown in Figure 1.

Labour Operation Number: T1674 Labour Time: 0.3 Hours.

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.