OIL CANNING ROOF PANEL DRUMMING NOISE/REPAIR

Models Affected: 1989 6000 STATION WAGONS

Some 1989 6000 station wagons may have a gap between the roof bows and the roof panel which may result in a drumming/oil canning noise on some road surfaces. To eliminate this condition apply 3M (R) Foam Tape #06307 or equivalent between roof bow and roof panel.

1. Remove headliner from vehicle (See Body Section, Service Manual 10-8).

2. Inspect roof bows to roof panel for adhesive sealer. Sealer should be present and contacting roof panel from side to side.

3. If adhesive sealer is not present or contacting roof panel, fabricate shim blocks (wood or other suitable material) large enough to slightly increase void space between roof bow and roof panel. (See Illustration).

4. Install shim blocks between bows and roof panel on both sides of bow (front and rear), slightly increasing space between roof bow and roof panel.

5. Cut strips of 3M (R) #06370 Scotchfoam Black Vinyl Foam Tape approximately four (4) inches long and attach to top of roof bows at four locations on each side of bows. Several lenghts of foam tape will be required to completely fill space from roof bow to roof panel.

6. Remove shim blocks, foam tape should be compressed slightly between bow and roof panel.

7. Replace headliner.

Labor 0peration Number : T1427 Labor Time : 1.4 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.