REAR DOOR GLASS CHATTER (ATTACH LOW FRICTION TAPE)

Subject: REAR DOOR GLASS CHATTER (ATTACH LOW FRICTION TAPE ON DOOR GLASS EDGES)

Models Affected: 1992 GRAND AM MODELS

Condition:

--------- Some owners of 1992 Grand Am sedans may comment on rear door glass chatter upon operation of rear electric windows.

Cause:

----- Excessive friction between glass and upper and lower run channels, resulting in an erratic glass movement known as glass chatter.

Correction:

---------- Attach six pieces of low friction segmented tape, Kit P/N 22586239, on rear door glass edges per following procedure:

- Remove rear door glass per 1992 "N" Service Manual procedure.

- Clean glass edges with 3M 08984 all purpose cleaner, or equivalent.

- Attach low friction segmented insulator tape as follows:

o Brown strip to be used on the front edge of glass P/N 22585829 part of kit P/N 22586239.

o White strip with hole punched in backing paper used on rear edge of glass P/N 22585830. The side of tape with hole punched in the backing paper is the narrow side. That side should be applied to the outside surface of glass.

o Remove protective backing from tape.

o Place the first strip of tape beginning approximately 5.0 mm from the tangent at the top of glass (Figure 1)

o Allow 5.0 mm clearance between tape strips.

o Repeat procedure on opposite side of glass.

Parts Information:

Parts are expected to be available on 7-27-92. In case of limited inventory, parts will be placed on 400 control to waive VIP surcharges. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. However, the part will be shipped premium transportation at dealer's expense and all other order types will be placed on backorder until the 400 control is removed.

Labor Operation Number: T-1865 Labor Time: .8 Hour each side

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.