WIND SLAPPING NOISE AT ROOF REPLACE ROOF RACK CROSS RAILS

SUBJECT: WIND BUFFETING AT ROOF RACK (REPLACE BOTH FRONT AND REAR CROSS RAILS WITH NEW PARTS)

VEHICLES AFFECTED: 1991 CHEVROLET CAPRICE WAGON

Condition:

------------ Wind noise/buffeting from roof area of vehicle.

Cause:

------- Roof rack cross rails

Correction:

------------- Replace BOTH front and rear cross rails with new parts as outlined in the Service Manual.

IMPORTANT: The rail assemblies MUST be replaced as a set due to the slight change in shape. Using an old rail with a new rail will not correct the wind noise condition and may result in unacceptable appearance.

Part numbers are as follows:

Front: 10079694

Rear: 10079695

IMPORTANT: Incorrect positioning of the new rails still has the potential to cause a buffeting noise. The correct position for the rails is either completely together, or at least 200 mm (8 inches) apart.

Use the most applicable Labour Operation and Time from the Canadian Labour Time Guide.

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.