WINDNOISE AT REAR OF FRT. DOOR FRAME (GLASS RUN CHANNEL)

VEHICLES AFFECTED: 1990 A-CARS

Some early 1990 "A" cars may exhibit windnoise conditions at the rear upper corner of the front door frame. The condition may be due to the glass run channel not being sealed to the door frame at the upper seat belt attaching point, and may be repaired by using the following procedure:

1. Lower door glass to full down position.

2. Using a heat gun, lightly heat the outer portion of the seat belt upper attachment cover. Heat will reduce the possibility of retainer pin breakage during removal.

3. Remove the outer cover by pulling forward (refer to Figure 1).

4. Inject black silicone rubber (3M#08662, American/Dominion Sure Seal #CDB or LZB, Permatex #16C or 16B, or equivalent) between the inboard edge of the run channel and the seat belt attaching bracket until slight squeeze out is seen (refer to Figure 2).

5. Carefully pull upper portion of run channel out of upper frame, inject material between frame and run channel at rear corner and reinstall channel into frame (refer to Figure 3).

6. Apply a small bead of material between the run channel and door frame at rear portion of door frame from the seat belt bracket downward to the belt line. (refer to Figure 4).

7. Raise and lower door glass to insure proper operation.

8. Immediately clean up any squeeze out with a cloth.

9. Reinstall outer cover of upper seat belt attachment.

Use most applicable Labour Operation and time from the Canadian Labour Time Guide.

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.