For 1990-2009 cars

# WINDNOISE REPAIR PROCEDURE UNEVEN SEALING SURFACES

MOOELS AFFECTED: 1981 and 1982

Generally windnoise problems are the result of uneven sealing surfaces at weatherstrip contact areas or misalignments of a door or door glass. There are certain specific areas on the 1981 and 1982 product where insufficient sealer or improperly located sealing strips can result in excessive windnoise. In some cases, the specific area can be isolated by listening with a length of rubber hose. These areas are as follows:

1. Century (1981), Regal, LeSabre, Electra Bodys: The area between the windshield pillar and windshield drip moulding may have a sealer void or improperly located sealing strip (Figure 1). (These voids are not readily visible and generally are located by road testing.)

2. Century (1981), Regal, LeSabre, Electra Bodys: If the windnoise could be classified as wind rush or "outside" noise, you should check the fit of the windshield reveal moulding. This moulding has a noise silencer strip between the moulding and the windshield. If the fit is not tight enough, the wind can get under this reveal moulding causing windrush or even a buzz as the moulding vibrates (Figure 2).

3. Century (1981), Regal, LeSabre, Electra Bodys: Whistle sound (like blowing air over pop bottle) can be caused by small openings at the base of the windshield pillar (Figure 3).

4. All body styles with frames around door glass - A windnoise heard in the upper rear corner of the front and/or rear door may be caused by poor sealing of the glass run channel to the upper door frame. This condition can be corrected by pulling down the run channel and applying a bead of 3M automotive bedding and glazing compound or equivalent to the door frame using extra sealer at corners (see Figure 4).

5. Regal - Riviera. The door glass to door opening weatherstrip must have adequate contact. This contact can be checked using water to wet the glass surface that contacts the door opening weatherstrip and closing door. Poor contact will be apparent and can be corrected in most cases by door glass adjustment.

6. Regal - Riviera. A windnoise at the lower windshield pillar post may be the result of insufficient sealer at the roof rail weatherstrip at the lower end below the roof drip moulding. (see Figure 5)

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.