WINDNOISE, DOOR AND DOOR GLASS AREAS (DIAGNOSIS AND P/N)
WINDNOISE, DOOR AND DOOR GLASS AREAS
Models Affected: 1988 GRAND PRIX
Customer comments regarding windnoise on 1988 Grand Prix models may be addressed by using the procedures on the individual items listed in this bulletin.
Proper diagnosis can be made with a variety of tools and methods including stethoscopes, dust guns, sonic instruments, visual inspections, etc. It is important to remember that windnoise can best be described as air leaking from the inside of the vehicle outward while traveling at highway speeds. Turbulence or windrush is best described as air passing over and around body openings and moldings.
Prior to any repairs, the door, auxiliary weatherstrips and door opening weatherstrips should be visually inspected for proper gaps, fits, weatherstrip contact and sealing. The vehicle should also be road tested to determine the location and degree of windnoise/ turbulence on the vehicle.
A primary area of windnoise may be at the rear upper corner of the door glass area and/or the front upper corner of the door glass next to the be mirror and filler. Either area may be due to an unsealed run channel and/or run channel retainer to the door frame.
Parts Required:
Description Part Number ----------- -----------
Run Channel Retainer Seal Right 10120490 Left 10120491 Run Channel Right 10126584 Left 10126585
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.
