ROAD NOISE/WINDNOISE AT FRONT DOOR-GLASS CHIPPED ON TOP

SUBJECT ROAD NOISE/WINDNOISE, FRONT DOOR GLASS CHIPPED ON TOP EDGE (SERVICE PROCEDURES)

MODELS/YEARS 1990 SILHOUETTE

CONDITIONS:

1. Road noise at base of front doors and sliding side door 2. Road noise at front door inner belt sealing strip 3. Windnoise at the top of the front doors 4. Front door glass chipped on the top edge

CORRECTION:

FOR CONDITION NUMBER 1

1. Open the door and clean the inboard lower edge of the door frame (hem flange) with oil free n aphtha or alcohol.

2. If body is significantly below 70' F (20' C) due to shop temperature or prior environmental temperature, warm body panel with heat lamp or heat gun.

A. Remove the protective covering from the sealing strip.

B. Install the new sealing strip. For front door installation start 13 mm (1 12 inch) rearward of the forward edge of the door.

C. For sliding door installation, apply sealing strip starting 13mm (1/2 inch) rearward of the front edge of the door.

IMPORTANT: It may be necessary to trim the rear edge of the sealing strip for proper fit.

RH Front Door Sealing Strip, P/N 10 1 74714

LH Front Door Sealing Strip, P/N 10174714

Sealing Strip Sliding Side Door, P/N 10174713

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation Number: T1645 Labor Time: 0.3 hour (for all 3 doors) Trouble Code: 92

FOR CONDITION NUMBER 2,3,4 (FOR POWER WINDOWS ONLY. NON-POWER WINDOWS ARE NOT AFFECTED)

1. Lower window to full down position

2. Remove lower trim panel and water deflector.

3. Remove wire harness retainer from inner panel to gain access for drilling hole.

IMPORTANT: For steps number 4 and 5 use drill stop on drill to stop the drill from coming in contact with the glass.

4. Using a 25 mm (1 inch) hole saw drill a hole in the inner panel straight down from the forward edge of the molded pocket in the inner panel at the center of the feature line. See Figure 2.

5. Reaching through the large access hole, position up-stop tab on end of regulator arm (See Figure 3) and hold in place with vice grips (5" needle type). Drill a 3.57 mm (9/64 inch) diameter hole in the sector arm to match hole in tab. Pop rivet into place, remove vice grips.

6. Drill another 3.57 mm (9/64 inch) diameter hole in the sector arm to match the hole in the tab, pop rivet into place.

7. Lightly file back side of rivet to prevent contact with regulator body.

8. Reinstall water deflector and trim panel.

9. Repeat the operation for the opposite side.

RH Front Door regulator up-stop tab, P/N 10186096

LH Front Door Regulator up-stop tab, P/N 10186097

Pop Rivet,two required for each up-stop, P/N 9437144

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation Number: T1644 Labor Time: 1.0 hour (for both front doors) Trouble Code: 92

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.