EXHAUST RATTLE NOISE (INSTALL LARGER MUFFLER)

SUBJECT: EXHAUST RATTLE NOISE (INSTALL LARGER MUFFLER)

VEHICLES AFFECTED: 1992 "C" MODELS WITH 4.9L (VIN B, RPO L26)

Some 1992 DeVilles and Fleetwoods may experience an exhaust rattle or rap noise, especially on cold operation.

A revised larger volume muffler assembly can be installed to help improve, though not completely correct, this condition.

To repair this condition use the following procedure:

1. Support intermediate pipe.

2. Cut intermediate pipe as close to muffler as tool will permit. Use J-35976 or equivalent.

3. Remove muffler hangers and muffler.

4. Install revised larger muffler, P/N 25617527, and different RH hanger, P/N 25559600.

5. Connect intermediate pipe to muffler saddle/"U" bolt type clamp.

6. Align muffler and intermediate pipe to proper clearance.

For vehicles repaired under warranty use:

Labour Operation: L2584

Labour Time: 0.5 hour.

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.