FRONT DOOR WINDOW RATTLE OR CHATTER NOISE

MODELS AFFECTED: 1986 RIVIERA

1986 Rivieras built prior to VIN 1G4EZ57B3GU402576 that exhibit a chatter or rattle condition in the door glass area, can be repaired using the following rework procedure.

1. Remove door glass assembly (see procedure in Section 5 of the Body Service Manual).

2. Lay glass assembly on a flat protected surface and using a sharp knife, scribe a line 4 mm (11/64") on the rear guide assembly as shown in attached illustration.

3. Using a coarse file, file of 4 mm (11/64") of rear guide as shown in attached illustration (make sure finished edge is smooth by filing edge using a fine file).

4. Install door glass assembly.

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.