For 1990-2009 cars

# EXHAUST RATTLE NOISE (INSTALL LARGER MUFFLER)

#### SUBJECT: EXHAUST RATTLE NOISE

#### MODELS AFFECTED: 1992 DE VILLES AND FLEETWOODS

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

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

To repair this condition use the following procedure:

1. Support intermediate pipe.

2. Cut intermediate pipe as close to muffier 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.

Parts are currently available from GMSPO.

For warranty purposes use labor Operation L2584 at .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.